! 2D Grid adjustment based on an approximate height for each station. GPS 
! observations are reduced to local North and East observations during processing.


! Define datum
! Datum Name; Semi-Major Axis; 1.0 / Flattening
_DATUM; NAD 83; 6378137.000000; 298.257222101


! Define the Units used in this file
! M - meters, U - US Feet, I - International Feet, C - Chains
! D - DMS, DD - Decimal Degrees, G - Grads (Gons), 
! Note: Lat and Lon must always be in DMS format (e.g., 100-30-40.1234 is entered as 100.30401234)
_UNITS; M; D


! Grid zone
_ADJUST_GRID; ILLINOIS,W,1202,TM


! Station 'FOZZIE' to be fixed in Lat(north) and Lon(east).
_LAT_NORTH_FIX; FOZZIE
_LON_EAST_FIX; FOZZIE


! Indicates the type of adjustment
_ADJUST_2D_GRID


! Define if unknown stations (referenced by observations) should be created at Adjust Time.
! Unknown stations are those not defined in the _STA_COORD record (see below).
_ADJUST_CREATE_MISSING_STATION


! All variances (squared standard deviation) will be multiplied by this value prior to adjustment
_ADJUST_APRIORI_FACTOR; 1.0


! Perform no more than this number of iterations when solving the adjustment. Most networks will
! converge within two to seven iterations when input data contains no major blunders. 
_ADJUST_MAX_ITER; 10


! Consider the adjustment completed, when the current iteration moves station coordinates less than
! this value (from the previous iteration).
_ADJUST_CONVERGE_CRITERIA; 0.001


! Confidence level for reporting - 95%
_ADJUST_CONFIDENCE_LEVEL; 0.95


! Use ellipsoid height field (for each station) instead of ortho height field during adjustment
_ADJUST_USE_ELLIPHGT


! Use a known approximate height for each station. This is not a mean height for the network. When
! using this option, you must provide an approximate height value at each station (scaled from a
! map if needed). For projects in highly variable terrain, this method is preferred over the usage
! of a mean project height.
_ADJUST_2D_KNOWN_HGT



! Define the ellip height for each station, since we are adjusting by approximate height at each station
!_ADJUST_CREATE_MISSING_STATION 
!           Name;   Lat; Lon; OrthoHgt; EllipHgt;  North;        East;          NorthSD;   EastSD;    HgtSD;     CorrNE; CorrNH; CorrEH; DeflNS; DeflEW
_STA_COORD; FOBART; 0;   0;   0;        1499.4;    0.;           0.;            0.001;     0.001;     0.001; 0.;     0.;     0.;     0.;     0.
_STA_COORD; FOZZIE; 0;   0;   0;        1000.0;    370001.10262; 685768.52417;  0.001;     0.001;     0.001; 0.;     0.;     0.;     0.;     0.
_STA_COORD; FRANK;  0;   0;   0;        1099.5;    0.;           0.;            0.001;     0.001;     0.001; 0.;     0.;     0.;     0.;     0.
_STA_COORD; FREDDY; 0;   0;   0;        900.5;     0.;           0.;            0.001;     0.001;     0.001; 0.;     0.;     0.;     0.;     0.


! GPS observations
!             AT Name; TO Name;  dx;       dy;         dz;        xx;      xy;  yy;    xz;  yz;  zz (upper diag column order)
_OBS_GPS_SET; FOZZIE;  FOBART;   71330.0;  -18079.2;  -20986.6;   0.1225;  0.;  0.18;  0.;  0.;  0.245
_OBS_GPS_SET; FOZZIE;  FRANK;    42807.35; -35643.35; -42625.7;   0.045;   0.;  0.08;  0.;  0.;  0.1225
_OBS_GPS_SET; FOZZIE;  FREDDY;   21334.7;  -11877.05; -14259.75;  0.02;    0.;  0.045; 0.;  0.;  0.08
_OBS_GPS_SET; FRANK;   FOBART;   28524.0;   17563.7;   21638.55;  0.32;    0.;  0.245; 0.;  0.;  0.18
_OBS_GPS_SET; FREDDY;  FOBART;   49995.7;   -6202.0;   -6726.7;   0.18;    0.;  0.245; 0.;  0.;  0.32
_OBS_GPS_SET; FREDDY;  FRANK;    21472.25; -23765.6;  -28365.25;  0.02;    0.;  0.045; 0.;  0.;  0.08


! Set Direction SD (standard deviations) to 8.0 seconds when file is loaded for the following directions
_G_DIR_SD; 8.0


! Observation set format with no zenith or slope distances
!             AT Name;  TO Name;  dir;       dir SD;  zenith;  Zenith SD;  chord;  Chord SD; InstrHgt; TargHgt;  Set Num
_OBS_DIR_SET; FRANK;    FOZZIE;   322.2940;  3.000;   NOOBS;   NOOBS;      NOOBS;  NOOBS;    1.5;      1.2;      1
_OBS_DIR_SET; FRANK;    FREDDY;   329.5853;  3.000;   NOOBS;   NOOBS;      NOOBS;  NOOBS;    1.5;      1.1;      1
_OBS_DIR_SET; FRANK;    FOBART;    45.4614;  3.000;   NOOBS;   NOOBS;      NOOBS;  NOOBS;    1.5;      1.8;      1


! Set Direction SD to 1.0 seconds when file is loaded for the following directions
_G_DIR_SD; 1.0


! Single observation record format
!         AT Name; TO Name;  dir;       dir SD;  InstrHgt; TargHgt  Set Num
_OBS_DIR; FRANK;   FOZZIE;   326.2935;  3.000;   0.6;      1.4;     2
_OBS_DIR; FRANK;   FREDDY;   333.5845;  3.000;   0.6;      1.4;     2
_OBS_DIR; FRANK;   FOBART;    49.4610;  3.000;   0.6;      1.4;     2


! Set Direction SD to 5.0 seconds when file is loaded for the following directions
_G_DIR_SD; 5.0


! Single observation record format
!         AT Name; TO Name;  dir;       dir SD;  InstrHgt; TargHgt  Set Num
_OBS_DIR; FREDDY;  FOBART;   100.1816;  3.000;   0.85;     1.42;    47
_OBS_DIR; FREDDY;  FRANK;    149.4916;  3.000;   0.67;     1.33;    47
_OBS_DIR; FREDDY;  FOZZIE;   310.5752;  3.000;   0.22;     3.7;     47