XQX          NO-LINE_DELIMITER:XQX
XQX          COUNTER_DELIMITER:|N|
XQX          ASK-FOR-OUTPUT-FILENAME           Replace "?" with "-"  to prompt for independent output file name
XQX________________________________________________________________________________________________________________________________
XQX R01 pcf
pcf
XQX R02 * control data                                                                                      -- Section Heading
* control data
XQX R03 C1 RSTFLE            -- text     , “restart” or “norestart”                                   , instructs PEST whether to write restart data
XQX R03 C2 PESTMODE          -- text     , “estimation”, “prediction”, “regularisation”, “pareto”     , PEST’s mode of operation
XQX R03 RSTFLE PESTMODE                                                                                     -- Variables
restart regularisation
XQX R04 C1 NPAR              -- integer  , greater than zero                                          , number of parameters
XQX R04 C2 NOBS              -- integer  , greater than zero                                          , number of observations
XQX R04 C3 NPARGP            -- integer  , greater than zero                                          , number of parameter groups
XQX R04 C4 NPRIOR            -- integer  , any integer value                                          , absolute value is number of prior information equations; negative value indicates supply of prior information in indexed format
XQX R04 C5 NOBSGP            -- integer  , greater than zero                                          , number of observation groups
XQX R04 C6 MAXCOMPDIM        -- integer  , optional; zero or greater                                  , number of elements in compressed Jacobian matrix
XQX R04 NPAR NOBS NPARGP NPRIOR NOBSGP [MAXCOMPDIM]                                                         -- Variables
   |N| NPAR |N|  |N| NOBS |N|  |N| NPARGP |N|  |N| NPRIOR |N|  |N| NOBSGP |N|
XQX R05 C1 NTPLFLE           -- integer  , greater than zero                                          , number of template files
XQX R05 C2 NINSFLE           -- integer  , greater than zero                                          , number of instruction files
XQX R05 C3 PRECIS            -- text     , “single” or “double”                                       , format for writing parameter values to model input files
XQX R05 C4 DPOINT            -- text     , “point” or “nopoint”                                       , omit decimal point in parameter values if possible
XQX R05 C5 NUMCOM            -- integer  , optional; greater than zero                                , number of command lines used to run model
XQX R05 C6 JACFILE           -- integer  , optional; zero or one                                      , indicates whether model provides external derivatives file
XQX R05 C7 MESSFILE          -- integer  , optional; zero or one                                      , indicates whether PEST writes PEST-to-model message file
XQX R05 NTPLFLE NINSFLE PRECIS DPOINT [NUMCOM JACFILE MESSFILE]                                             -- Variables
    |N| NTPLFLE |N|  |N| NINSFLE |N|       single          point
XQX R06 C1 RLAMBDA1          -- real     , zero or greater                                            , initial Marquardt lambda
XQX R06 C2 RLAMFAC           -- real     , positive or negative, but not zero                         , dictates Marquardt lambda adjustment process
XQX R06 C3 PHIRATSUF         -- real     , between zero and one                                       , fractional objective function sufficient for end of current iteration
XQX R06 C4 PHIREDLAM         -- real     , between zero and one                                       , termination criterion for Marquardt lambda search
XQX R06 C5 NUMLAM            -- integer  , one or greater                                             , maximum number of Marquardt lambdas to test
XQX R06 C6 JACUPDATE         -- integer  , optional; zero or greater                                  , activation of Broyden’s Jacobian update procedure
XQX R06 C7 LAMFORGIVE        -- text     , “lamforgive” or “nolamforgive”                             , treat model run failure during lambda search as high objective function
XQX R06 RLAMBDA1 RLAMFAC PHIRATSUF PHIREDLAM NUMLAM [JACUPDATE] [LAMFORGIVE]                                -- Variables
         10.0      2.0      0.15      0.02     10       1       lamforgive
XQX R07 C1 RELPARMAX         -- real     , greater than zero                                          , parameter relative change limit
XQX R07 C2 FACPARMAX         -- real     , greater than one                                           , parameter factor change limit
XQX R07 C3 FACORIG           -- real     , scales sensitvities if parameter value shrinks,  must >0.000. Use 0.001, Not used for log-transformed parameters
XQX R07 C4 IBOUNDSTICK       -- integer  , optional; zero or greater                                  , instructs PEST not to compute derivatives for parameter at its bounds
XQX R07 C5 UPVECBEND         -- integer  , optional; zero or one                                      , instructs PEST to bend parameter upgrade vector if parameter hits bounds
XQX R07 RELPARMAX FACPARMAX FACORIG [IBOUNDSTICK UPVECBEND]                                                 -- Variables
         25.0       25.0    0.001        1           1
XQX R08 C1 PHIREDSWH         -- real     , between zero and one                                       , sets objective function change for introduction of central derivatives
XQX R08 C2 NOPTSWITCH        -- integer  , optional; one or greater                                   , iteration before which PEST will not switch to central derivatives computation
XQX R08 C3 SPLITSWH          -- real     , optional; zero or greater                                  , the factor by which the objective function rises to invoke split slope derivatives analysis until end of run
XQX R08 C4 DOAUI             -- text     , “aui”, “auid”, or “noaui”                                  , instructs PEST to implement automatic user intervention
XQX R08 C5 DOSENREUSE        -- text     , “senreuse” or “nosenreuse”                                 , instructs PEST to re-use parameter sensitivities
XQX R08 PHIREDSWH [NOPTSWITCH] [SPLITSWH] [DOAUI] [DOSENREUSE]                                              -- Variables
           0.1
XQX R09 C1 NOPTMAX           -- integer  , -2, -1, 0, or any number greater than zero                 , number of optimisation iterations
XQX R09 C2 PHIREDSTP         -- real     , greater than zero                                          , relative objective function reduction triggering termination
XQX R09 C3 NPHISTP           -- integer  , greater than zero                                          , number of successive iterations over whichPHIREDSTP applies
XQX R09 C4 NPHINORED         -- integer  , greater than zero                                          , number of iterations since last drop in objective function to trigger termination
XQX R09 C5 RELPARSTP         -- real     , greater than zero                                          , maximum relative parameter change triggering termination
XQX R09 C6 NRELPAR           -- integer  , greater than zero                                          , number of successive iterations over which RELPARSTP applies
XQX R09 C7 PHISTOPTHRESH     -- real     , optional; zero or greater                                  , objective function threshold triggering termination
XQX R09 C8 LASTRUN           -- integer  , optional; zero or one                                      , instructs PEST to undertake (or not) final model run with best parameters
XQX R09 C9 PHIABANDON        -- real/text, optional                                                   , objective function value at which to abandon optimisation process or filename containing abandonment schedule
XQX R09 NOPTMAX PHIREDSTP NPHISTP NPHINORED RELPARSTP NRELPAR [PHISTOPTHRESH] [LASTRUN] [PHIABANDON]        -- Variables
  0     0.005      5         5       0.001      5
XQX R10 C1 ICOV              -- integer  , zero or one                                                , record covariance matrix in matrix file
XQX R10 C2 ICOR              -- integer  , zero or one                                                , record correlation coefficient matrix in matrix file
XQX R10 C3 IEIG              -- integer  , zero or one                                                , record eigenvectors in matrix file
XQX R10 C4 IRES              -- integer  , zero or one                                                , record resolution data
XQX R10 C5 JCOSAVE           -- text     , “jcosave” or “nojcosave”                                   , Save best Jacobian file as a JCO file - overwriting previously-saved files of the same name as the inversion process progresses.
XQX R10 C6 VERBOSEREC        -- text     , “verboserec” or “noverboserec”                             , If set to “noverboserec”, parameter and observation data lists are ommitted from the run record file.
XQX R10 C7 JCOSAVEITN        -- text     , “jcosaveitn” or “nojcosaveitn”                             , Write current jacobian matrix to iteration-specific JCO file at the end of every optimisation iteration.
XQX R10 C8 REISAVEITN        -- text     , “reisaveitn” or “noreisaveitn”                             , Store best-fit residuals to iteration-specific residuals file at end of every optimisation iteration.
XQX R10 C9 PARSAVEITN        -- text     , “parsaveitn” or “noparsaveitn”                             , Store iteration specific parameter value file.
XQX R10 ICOV ICOR IEIG [IRES] [JCOSAVE] [VERBOSEREC] [JCOSAVEITN] [REISAVEITN] [PARSAVEITN]                 -- Variables
         0    0    0
XQX________________________________________________________________________________________________________________________________
XQX R11 * automatic user intervention                                                                       -- Section Heading
XQX R12 C1 MAXAUI            -- integer  , zero or greater                                            , maximum number of AUI iterations per optimisation iteration
XQX R12 C2 AUISTARTOPT       -- integer  , one or greater                                             , optimisation iteration at which to commence AUI
XQX R12 C3 NOAUIPHIRAT       -- real     , between zero and one                                       , relative objective function reduction threshold triggering AUI
XQX R12 C4 AUIRESTITN        -- integer  , zero or greater, but not one                               , AUI rest interval expressed in optimisation iterations
XQX R12 MAXAUI AUISTARTOPT NOAUIPHIRAT AUIRESTITN                                                           -- Variables
XQX R13 C1 AUISENSRAT        -- real     , greater than one                                           , composite parameter sensitivity ratio triggering AUI
XQX R13 C2 AUIHOLDMAXCHG     -- integer  , zero or one                                                , instructs PEST to target parameters which change most when deciding which parameters to hold
XQX R13 C3 AUINUMFREE        -- integer  , greater than zero                                          , cease AUI when only AUINUMFREE parameters are unheld
XQX R13 AUISENSRAT AUIHOLDMAXCHG AUINUMFREE                                                                 -- Variables
XQX R14 C1 AUIPHIRATSUF      -- real     , between zero and one                                       , relative objective function improvement for termination of AUI
XQX R14 C2 AUIPHIRATACCEPT   -- real     , between zero and one                                       , relative objective function reduction threshold for acceptance of AUI-calculated parameters
XQX R14 C3 NAUINOACCEPT      -- integer  , greater than zero                                          , number of iterations since acceptance of parameter change for termination of AUI
XQX R14 AUIPHIRATSUF AUIPHIRATACCEPT NAUINOACCEPT                                                           -- Variables
XQX________________________________________________________________________________________________________________________________
XQX R15 * singular value decomposition                                                                      -- Section Heading
* singular value decomposition
XQX R16 C1 SVDMODE           -- integer  , zero or one                                                , activates truncated singular value decomposition for solution of inverse problem
XQX R16 SVDMODE                                                                                             -- Variables
          1
XQX R17 C1 MAXSING           -- integer  , greater than zero                                          , number of singular values at which truncation occurs
XQX R17 C2 EIGTHRESH         -- real     , zero or greater, but less than one                         , eigenvalue ratio threshold for truncation
XQX R17 MAXSING EIGTHRESH                                                                                   -- Variables
     |N| NPAR |N|       1.0E-11
XQX R18 C1 EIGWRITE          -- integer  , zero or one                                                , determines content of SVD output file
XQX R18 EIGWRITE                                                                                            -- Variables
         0
XQX________________________________________________________________________________________________________________________________
XQX R19 * lsqr                                                                                              -- Section Heading
XQX R20 C1 LSQRMODE          -- integer  , zero or one                                                , activates LSQR solution of inverse problem
XQX R20 LSQRMODE                                                                                            -- Variables
XQX R21 C1 LSQR_ATOL         -- real     , zero or greater                                            , LSQR algorithm atol variable
XQX R21 C2 LSQR_BTOL         -- real     , zero or greater                                            , LSQR algorithm btol variable
XQX R21 C3 LSQR_CONLIM       -- real     , zero or greater                                            , LSQR algorithm conlim variable
XQX R21 C4 LSQR_ITNLIM       -- integer  , greater than zero                                          , LSQR algorithm itnlim variable
XQX R21 LSQR_ATOL LSQR_BTOL LSQR_CONLIM LSQR_ITNLIM                                                         -- Variables
XQX R22 C1 LSQR_WRITE        -- integer  , zero or one                                                , instructs PEST to write LSQR file
XQX R22 LSQR_WRITE                                                                                          -- Variables
XQX________________________________________________________________________________________________________________________________
XQX R23 * svd assist                                                                                        -- Section Heading
XQX R24 C1 BASEPESTFILE      -- text     , a filename                                                 , name of base PEST control file
XQX R24 BASEPESTFILE                                                                                        -- Variables
XQX R25 C1 BASEJACFILE       -- text     , a filename                                                 , name of base PEST Jacobian matrix file
XQX R25 BASEJACFILE                                                                                         -- Variables
XQX R26 C1 SVDA_MULBPA       -- integer  , zero or one                                                , instructs PEST to record multiple BPA files
XQX R26 C2 SVDA_SCALADJ      -- integer  , -4 to 4                                                    , sets type of parameter scaling undertaken in super parameter definition
XQX R26 C3 SVDA_EXTSUPER     -- integer  , 0, 1, 2, -2, 3                                             , sets means by which super parameters are calculated
XQX R26 C4 SVDA_SUPDERCALC   -- integer  , zero or one                                                , instructs PEST to compute super parameter sensitivities from base parameter sensitivities
XQX R26 C5 SVDA_PAR_EXCL     -- integer  , 0, 1 or -1                                                 , if set to 1, instructs PEST to compute super parameters on basis only of observation group in base parameter PEST control file to which pareto-adjustable weighting is assigned in super parameter PEST control file. If set to -1 all groups other than this form basis for super parameter definition.
XQX R26 SVDA_MULBPA SVDA_SCALADJ SVDA_EXTSUPER SVDA_SUPDERCALC SVDA_PAR_EXCL                                -- Variables
XQX R27 * sensitivity reuse                                                                                 -- Section Heading
XQX R28 C1 SENRELTHRESH      -- real     , zero to one                                                , relative parameter sensitivity below which sensitivity re-use is activated for a parameter
XQX R28 C2 SENMAXREUSE       -- integer  , integer other than zero                                    , maximum number of re-used sensitivities per iteration
XQX R28 SENRELTHRESH SENMAXREUSE                                                                            -- Variables
XQX R29 C1 SENALLCALCINT     -- integer  , greater than one                                           , iteration interval at which all sensitivities re- calculated
XQX R29 C2 SENPREDWEIGHT     -- real     , any number                                                 , weight to assign to prediction in computation of composite parameter sensitivities to determine sensitivity re-use
XQX R29 C3 SENPIEXCLUDE      -- test     , “yes” or “no”                                              , include or exclude prior information when computing composite parameter sensitivities to determine sensitivity re-use
XQX R29 SENALLCALCINT SENPREDWEIGHT SENPIEXCLUDE                                                            -- Variables
XQX________________________________________________________________________________________________________________________________
XQX R30 * parameter groups                                                                                  -- Section Heading
* parameter groups
XQX R31 C1 PARGPNME          -- text     , 12 characters or less                                      , parameter group name
XQX R31 C2 INCTYP            -- text     , “relative”, “absolute”, “rel_to_max”                       , method by which parameter increments are calculated
XQX R31 C3 DERINC            -- real     , greater than zero                                          , absolute or relative parameter increment
XQX R31 C4 DERINCLB          -- real     , zero or greater                                            , absolute lower bound of relative parameter increment
XQX R31 C5 FORCEN            -- text     , “switch”, “always_2”, “always_3”, “switch_5”, “always_5”   , determines whether central derivatives calculation is undertaken, and whether three points or four points are employed in central derivatives calculation
XQX R31 C6 DERINCMUL         -- real     , greater than zero                                          , derivative increment multiplier when undertaking central derivatives calculation
XQX R31 C7 DERMTHD           -- text     , “parabolic”, “outside_pts”, “best_fit”, “minvar”, “maxprec”, method of central derivatives calculation
XQX R31 C8 SPLITTHRESH       -- real     , greater than zero (or zero to deactive)                    , slope threshold for split slope analysis
XQX R31 C9 SPLITRELDIFF      -- real     , greater than zero                                          , relative slope difference threshold for action
XQX R31C10 SPLITACTION       -- text     , text                                                       , “smaller”, “zero” or “previous”
XQX R31 PARGPNME INCTYP DERINC DERINCLB FORCEN DERINCMUL DERMTHD [SPLITTHRESH SPLITRELDIFF SPLITACTION]     -- Variables
XQX R31 (one such line for each of NPARGP parameter groups)                                                 -- Variables
   COUNTER_START:NPARGP
HydK     relative  0.01      0.0   always_2    2.0    parabolic
   COUNTER_STOP:NPARGP
XQX________________________________________________________________________________________________________________________________
XQX R32 * parameter data                                                                                    -- Section Heading
* parameter data
XQX R33 C1 PARNME            -- text     , 12 characters or less                                      , parameter name
XQX R33 C2 PARTRANS          -- text     , “none”, “log”, “fixed” or “tied”                           , As-Is, Log-transformed, not estimated, or linked to another parameter
XQX R33 C3 PARCHGLIM         -- text     , “relative” or “factor”                                     , type of parameter change limit
XQX R33 C4 PARVAL1           -- real     , any real number                                            , initial parameter value
XQX R33 C5 PARLBND           -- real     , less than or equal to PARVAL1                              , parameter lower bound
XQX R33 C6 PARUBND           -- real     , greater than or equal to PARVAL1                           , parameter upper bound
XQX R33 C7 PARGP             -- text     , 12 characters or less                                      , parameter group name
XQX R33 C8 SCALE             -- real     , any number other than zero      transforms PEST parameter, bp, to model parameter, bm, with bp = (bm - OFFSET) / SCALE
XQX R33 C9 OFFSET            -- real     , any number                      transforms PEST parameter, bp, to model parameter, bm, with bp = (bm - OFFSET) / SCALE
XQX R33 C10 DERCOM           -- integer  , zero or greater                                            , model command line used in computing parameter increments
XQX R33 PARNME PARTRANS PARCHGLIM PARVAL1 PARLBND PARUBND PARGP SCALE OFFSET DERCOM                         -- Variables
XQX R33 (one such line for each of NPAR parameters)                                                         -- Variables
   COUNTER_START:NPAR
    Redirect to file:PEST_Parameters.txt         !!   I/O redirect occurs here
   COUNTER_STOP:NPAR
XQX R34 C2 PARTIED           -- text     , 12 characters or less                                      , the name of the parameter to which another parameter is tied
XQX R34 PARNME PARTIED                                                                                      -- Variables
XQX R34 (one such line for each tied parameter)                                                             -- Variables
   Redirect to file:PEST_TIED-Parameters-HydK.txt     !!   I/O redirect occurs here
   Redirect to file:PEST_TIED-Parameters-Ss.txt     !!   I/O redirect occurs here
XQX________________________________________________________________________________________________________________________________
XQX R35 * observation groups                                                                                -- Section Heading
* observation groups
XQX R36 C1 OBGNME            -- text     , 12 characters or less                                      , observation group name to which observation assigned
XQX R36 C2 GTARG             -- real     , positive                                                   , group-specific target measurement objective function
XQX R36 C3 COVFILE           -- text     , a filename                                                 , optional covariance matrix file associated with group
XQX R36 OBGNME [GTARG] [COVFLE]                                                                             -- Variables
XQX R36 (one such line for each of NOBSGP observation group)                                                -- Variables
   COUNTER_START:NOBSGP
regul_K
WL_OBS
   COUNTER_STOP:NOBSGP
XQX________________________________________________________________________________________________________________________________
XQX R37 * observation data                                                                                  -- Section Heading
* observation data
XQX R38 C1 OBSNME            -- text     , 20 characters or less                                      , observation name, is case insensitive.
XQX R38 C2 OBSVAL            -- real     , any number                                                 , measured value of observation
XQX R38 C3 WEIGHT            -- real     , zero or greater                                            , Emphasis placed on matching an observation.
XQX R38 C4 OBGNME            -- text     , 12 characters or less                                      , observation group name to which observation assigned
XQX R38 OBSNME OBSVAL WEIGHT OBGNME                                                                         -- Variables
XQX R38 (one such line for each of NOBS observations)                                                       -- Variables
   COUNTER_START:NOBS
  PEST_ER-20-7.Observations.txt
  PEST_ER-20-8#2m.Observations.txt
   COUNTER_STOP:NOBS
XQX________________________________________________________________________________________________________________________________
XQX R39 * derivatives command line                                                                          -- Section Heading
XQX R40 C1 DERCOMLINE        -- text     , system command                                             , command to run model for derivatives calculation
XQX R40 DERCOMLINE                                                                                          -- Variables
XQX R41 C1 EXTDERFLE         -- text     , a filename                                                 , name of external derivatives file
XQX R41 EXTDERFLE                                                                                           -- Variables
XQX________________________________________________________________________________________________________________________________
XQX R42 * model command line                                                                                -- Section Heading
* model command line
XQX R43 C1 COMLINE           -- text     , system command                                             , command to run model
XQX R43 COMLINE                                                                                             -- Variables
XQX R43 (one such line for each of NUMCOM command lines)                                                    -- Variables
01_MF_ALL.bat
XQX________________________________________________________________________________________________________________________________
XQX R44 * model input/output                                                                                -- Section Heading
* model input/output
XQX R45 C1 TEMPFLE           -- text     , a filename                                                 , template file
XQX R45 C2 INFLE             -- text     , a filename                                                 , model input file
XQX R45 TEMPFLE INFLE                                                                                       -- Variables
XQX R45 (one such line for each of NTPLFLE template files)                                                  -- Variables
   COUNTER_START:NTPLFLE
  INPUT_ALL.LPF-TPL.txt            INPUT_ALL.LPF.txt
XQX
  TPL-PP_Ss-HSU0069.txt            PP_Ss-HSU0069.txt
  TPL-PP_Ss-HSU0003.txt            PP_Ss-HSU0003.txt
  TPL-PP_Ss-HSU0004.txt            PP_Ss-HSU0004.txt
  TPL-PP_Ss-HSU0005.txt            PP_Ss-HSU0005.txt
  TPL-PP_Ss-HSU0006.txt            PP_Ss-HSU0006.txt
  TPL-PP_Ss-HSU0007.txt            PP_Ss-HSU0007.txt
  TPL-PP_Ss-HSU0008.txt            PP_Ss-HSU0008.txt
  TPL-PP_Ss-HSU0009.txt            PP_Ss-HSU0009.txt
  TPL-PP_Ss-HSU0010.txt            PP_Ss-HSU0010.txt
  TPL-PP_Ss-HSU0011.txt            PP_Ss-HSU0011.txt
XQX
  TPL-PP_HydK-HSU0003.txt          PP_HydK-HSU0003.txt
  TPL-PP_HydK-HSU0004.txt          PP_HydK-HSU0004.txt
  TPL-PP_HydK-HSU0005.txt          PP_HydK-HSU0005.txt
  TPL-PP_HydK-HSU0006.txt          PP_HydK-HSU0006.txt
  TPL-PP_HydK-HSU0007.txt          PP_HydK-HSU0007.txt
  TPL-PP_HydK-HSU0008.txt          PP_HydK-HSU0008.txt
  TPL-PP_HydK-HSU0009.txt          PP_HydK-HSU0009.txt
  TPL-PP_HydK-HSU0010.txt          PP_HydK-HSU0010.txt
  TPL-PP_HydK-HSU0011.txt          PP_HydK-HSU0011.txt
   COUNTER_STOP:NTPLFLE
XQX R46 C1 INSFLE            -- text     , a filename                                                 , instruction file
XQX R46 C2 OUTFLE            -- text     , a filename                                                 , model output file
XQX R46 INSFLE OUTFLE                                                                                       -- Variables
XQX R46 (one such line for each of NINSLFE instruction files)                                               -- Variables
   COUNTER_START:NINSFLE
..\MF_ER-20-7\Pcomp_ER-20-7.WL.ins.txt            ..\MF_ER-20-7\Pcomp_ER-20-7.WLsimulated.txt
..\MF_ER-20-8#2m\Pcomp_ER-20-8#2m.WL.ins.txt      ..\MF_ER-20-8#2m\Pcomp_ER-20-8#2m.WLsimulated.txt
   COUNTER_STOP:NINSFLE
XQX________________________________________________________________________________________________________________________________
XQX___________PRIOR INFORMATION -- SUPPORTS REGULARIZATION _________________________________
XQX R47 * prior information                                                                                 -- Section Heading
* prior information
XQX
XQX R48  Each item in a PI equation must be separated by at least one space.
XQX R48  Each new PI equation begins on a new line.
XQX R48  No prior information line can exceed 300 characters
XQX R48  Prior information lines must adhere to syntax,
XQX R48             --Begin with a prior information label, character variable PILBL, limited to <=20 characters
XQX R48             --Follow label w/ PI equation.
XQX R48             --All parameters referenced in a PI equation must be adjustable
XQX R48             --A parameter can be referenced only once in A PI equation, can be referenced in multiple PI equations.
XQX R48             --Never omit parameter factor,
XQX R48 C1 PILBL       -- a prior information label
XQX R48 C2 PIFAC       -- Multiplier for parameter
XQX R33 C1 PARNME      -- text     , 12 characters or less,  unique parameter name, defined previously in "* parameter data" section
XQX R48 C3 PIVAL       -- Result of prior information equation.
XQX R48 C4 WEIGHT      -- real, Emphasis placed on matching an regularization constraint.
XQX R36 C1 OBGNME      -- character*12, name of regularization observation group                      , observation group name to which observation assigned
XQX R48 PILBL PIFAC * PARNME + PIFAC * log(PARNME) ... = PIVAL WEIGHT OBGNME                                -- Variables
XQX R48 (one such line for each of NPRIOR articles of prior information)                                    -- Variables
   COUNTER_START:NPRIOR
 Redirect to file:PEST_PriorInfo2Regular_HYD-K.txt        !!   I/O redirect occurs here
 Redirect to file:PEST_PriorInfo2Regular_Ss.txt           !!   I/O redirect occurs here
   COUNTER_STOP:NPRIOR
XQX________________________________________________________________________________________________________________________________
XQX R49 * predictive analysis                                                                               -- Section Heading
XQX R50 C1 NPREDMAXMIN       -- integer  , -1 or 1                                                    , maximise or minimise prediction
XQX R50 C2 PREDNOISE         -- integer  , 0 or 1                                                     , instructs PEST to include predictive noise in prediction
XQX R50 NPREDMAXMIN [PREDNOISE]                                                                             -- Variables
XQX R51 C1 PD0               -- real     , greater than zero                                          , target objective function
XQX R51 C2 PD1               -- real     , greater than PD0                                           , acceptable objective function
XQX R51 C3 PD2               -- real     , greater than PD1                                           , objective function at which Marquardt lambda testing procedure is altered as prediction is maximised/minimised
XQX R51 PD0 PD1 PD2                                                                                         -- Variables
XQX R52 C1 ABSPREDLAM        -- real     , zero or greater                                            , absolute prediction change to terminate Marquardt lambda testing
XQX R52 C2 RELPREDLAM        -- real     , zero or greater                                            , relative prediction change to terminate Marquardt lambda testing
XQX R52 C3 INITSCHFAC        -- real     , greater than zero                                          , initial line search factor
XQX R52 C4 MULSCHFAC         -- real     , greater than one                                           , factor by which line search factors are increased along line
XQX R52 C5 NSEARCH           -- integer  , greater than zero                                          , maximum number of model runs in line search
XQX R52 ABSPREDLAM RELPREDLAM INITSCHFAC MULSCHFAC NSEARCH                                                  -- Variables
XQX R53 C1 ABSPREDSWH        -- real     , zero or greater                                            , absolute prediction change at which to use central derivatives calculation
XQX R53 C2 RELPREDSWH        -- real     , zero or greater                                            , relative prediction change at which to use central derivatives calculation
XQX R53 ABSPREDSWH RELPREDSWH                                                                               -- Variables
XQX R54 C1 NPREDNORED        -- integer  , one or greater                                             , iterations since prediction raised/lowered at which termination is triggered
XQX R54 C2 ABSPREDSTP        -- real     , zero or greater                                            , absolute prediction change at which to trigger termination
XQX R54 C3 RELPREDSTP        -- real     , zero or greater                                            , relative prediction change at which to trigger termination
XQX R54 C4 NPREDSTP          -- integer  , two or greater                                             , number of iterations over which ABSPREDSTP and RELPREDSTP apply
XQX R54 NPREDNORED ABSPREDSTP RELPREDSTP NPREDSTP                                                           -- Variables
XQX________________________________________________________________________________________________________________________________
XQX  7.3.3 Control File - “Regularisation” Section
XQX R55 * regularisation                                                                                    -- Section Heading
* regularisation
XQX R56 C1 PHIMLIM           -- real     , greater than zero                                          , Upper level of model-to-measurement misfit -- Real error level
XQX R56 C2 PHIMACCEPT        -- real     , greater than PHIMLIM                                       , Should be 5-10% > PHIMLIM, gives PEST “room to move”
XQX R56 C3 FRACPHIM          -- real     , optional; zero or greater, but less than one               , Makes adjustable PHIMLIM = PhiMeas*FRACPHIM, USE 0.1 to 0.3, Ignored if <=0
XQX R56 C4 MEMSAVE           -- text     , “memsave” or “nomemsave”                                   , activate conservation of memory at cost of execution speed and quantity of model output"
XQX R56 PHIMLIM PHIMACCEPT [FRACPHIM] [MEMSAVE]                                                             -- Variables
 4.0   5.0   0.2                                 !!   Weighted SS error = XXXX  >>>   RMS error  = 0.0xx 
XQX R57 C1 WFINIT            -- real     , greater than zero                                          , initial regularisation weight factor, adjusts total PHI emphasis between assumptions and measurements.
XQX R57 C2 WFMIN             -- real     , greater than zero                                          , minimum regularisation weight factor, USE small, 1E-10. 
XQX R57 C3 WFMAX             -- real     , greater than WFMAX                                         , maximum regularisation weight factor, USE big, 1E+10.   
XQX R57 C4 LINREG            -- text     , “linreg” or “nonlinreg”                                    , informs PEST that all regularisation constraints are linear
XQX R57 C5 REGCONTINUE       -- text     , “continue” or “nocontinue”                                 , instructs PEST to continue minimising regularisation objective function even if measurement objective function less than PHIMLIM
XQX R57 WFINIT   WFMIN       WFMAX       [LINREG]     [REGCONTINUE]                                                           -- Variables
        0.01   1.000E-10  1.00E+10       linreg       nocontinue
XQX R58 C1 WFFAC             -- real     , greater than one                                           , regularisation weight factor adjustment factor
XQX R58 C2 WFTOL             -- real     , greater than zero                                          , convergence criterion for regularisation weight factor
XQX R58 C3 IREGADJ           -- integer  , 0, 1, 2, 3, 4 or 5                                         , instructs PEST to perform inter-regularisation group weight factor adjustment, or to compute new relative weights for regularisation observations and prior information equations
XQX R58 C4 NOPTREGADJ        -- integer  , 1 or greater                                               , the optimisation iteration interval for re- calculation of regularisation weights if IREGADJ is 4 or 5
XQX R58 C5 REGWEIGHTRAT      -- real     , absolute value of 1 or greater                             , the ratio of highest to lowest regularisation weight; spread is logarithmic with null space projection if set negative
XQX R58 C6 REGSINGTHRESH     -- real     , less than 1 and greater than zero                          , singular value of XtQX (as factor of highest singular value) at which use of higher regularisation weights commences if IREGADJ is set to 5
XQX R58 WFFAC WFTOL IREGADJ [NOPTREGADJ REGWEIGHTRAT [REGSINGTHRESH]]                                       -- Variables
         1.4  1.0e-2  1
