! Define datum ! Datum is not used in levelling by height differences (any datum will suffice) ! 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 ! Station to be fixed in 1D. Use _HGT_FIX line for each fixed station _HGT_FIX; BOB ! Indicates the type of adjustment _ADJUST_1D_HGT ! Adjust using weights derived from observation standard deviation _ADJUST_1D_WGT; 2 ! 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 ! Confidence level for reporting - 95% _ADJUST_CONFIDENCE_LEVEL; 0.95 ! Define all or simply the known station coordinates here (use _ADJUST_CREATE_MISSING_STATION when not defining all stations) !_ADJUST_CREATE_MISSING_STATION ! Name; Lat; Lon; OrthoHgt; EllipHgt; North; East; NorthSD; EastSD; HgtSD; CorrNE; CorrNH; CorrEH; DeflNS; DeflEW _STA_COORD; BOB; 0; 0; 100.0; 0; 0.; 0.; 0; 0; 0.02; 0.; 0.; 0.; 0.; 0. _STA_COORD; CINDY; 0; 0; 102.568; 0; 0.; 0.; 0; 0; 0.02; 0.; 0.; 0.; 0.; 0. _STA_COORD; DEBRA; 0; 0; 107.669; 0; 0.; 0.; 0; 0; 0.02; 0.; 0.; 0.; 0.; 0. _STA_COORD; ED; 0; 0; 103.841; 0; 0.; 0.; 0; 0; 0.02; 0.; 0.; 0.; 0.; 0. _STA_COORD; FAYE; 0; 0; 100.576; 0; 0.; 0.; 0; 0; 0.02; 0.; 0.; 0.; 0.; 0. _STA_COORD; GABE; 0; 0; 99.554; 0; 0.; 0.; 0; 0; 0.02; 0.; 0.; 0.; 0.; 0. ! Observations ! AT Name; TO Name; Hgt Diff; Hgt Diff SD _OBS_HGTDIFF; BOB; CINDY; 2.56916; 0.050 _OBS_HGTDIFF; BOB; GABE; -0.44714; 0.10 _OBS_HGTDIFF; CINDY; DEBRA; 5.09749; 0.075 _OBS_HGTDIFF; CINDY; FAYE; -1.98974; 0.045 _OBS_HGTDIFF; DEBRA; ED; -3.82921; 0.055 _OBS_HGTDIFF; ED; FAYE; -3.26777; 0.068 _OBS_HGTDIFF; FAYE; GABE; -1.02169; 0.085