! 2D Geodetic adjustment based on an approximate height for each station


! 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; COLORADO,N,0501,L2


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


! Indicates the type of adjustment
_ADJUST_2D_LATLON


! 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


! Disabled to use OrthoHgt field from each station
!_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


! ALTA SETTING. 0.02134 meter is default, so no need to set here     
!_ADJUST_ALTA_FIXED; 0.02134
! ALTA SETTING. 100 PPM
_ADJUST_ALTA_PPM; 100


! Setting this to ZERO is same as default. When zero, the tau statistic is
! computed to determine the threshold for outlier observations (based on 
! each observation's standardized residual). When greater than ZERO, the 
! value you enter becomes the threshold. 
_ADJUST_STANRES_THRESHOLD; 0.0


! Define the ortho 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; AJAX;   40.0;  -108.0;  3010.0;     0;        0.;    0.;   0.001;   0.001;  0.001; 0.;     0.;     0.;     0;      0
_STA_COORD; BLANCA; 0;        0;    3259.98244; 0;        0.;    0.;   0.001;   0.001;  0.001; 0.;     0.;     0.;     0;      0
_STA_COORD; CASTLE; 0;        0;    3512.13444; 0;        0.;    0.;   0.001;   0.001;  0.001; 0.;     0.;     0.;     0;      0
_STA_COORD; DONNER; 0;        0;    3453.48341; 0;        0.;    0.;   0.001;   0.001;  0.001; 0.;     0.;     0.;     0;      0


! Observation set format with no zenith or slope distances
!             AT Name;  TO Name;  az;       az SD;   zenith;   zenith SD;  chord;     Chord SD;  InstrHgt;  TargHgt
_OBS_AZ_SET;  AJAX;     BLANCA;   21.0124;  3.000;   82.4930;  5.000;      1998.660;  0.01500;   3.00000;   3.00000
_OBS_AZ_SET;  CASTLE;   AJAX;     293.582;  3.000; 129.26590;  5.000;       788.750;  0.00500;   2.00000;   3.00000
_OBS_AZ_SET;  CASTLE;   BLANCA;    4.1326;  5.000;  96.50340;  5.000;      2119.234;  0.00700;   0.00000;   0.00000

_OBS_AZ_SET;  BLANCA;   DONNER;  198.1553;  3.000;  85.51350;  5.000;      2685.140;  0.01200;   6.00000;   7.00000
_OBS_AZ_SET;  DONNER;   AJAX;     10.2700;  3.000; 122.09300;  5.000;       831.400;  0.00800;  20.00000;  21.00000
_OBS_AZ_SET;  DONNER;   CASTLE;   56.5830;  3.000;  85.49260;  5.000;       818.300;  0.00900;  10.00000;  11.00000