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File Formats

Chapter 7

 

 

 

7.4.3FWD & REV Files

This section explains the trajectory output, which has entries for each epoch. The first line of the output file always begins with $OUTREC, and is followed by the version number, the processing engine, and the type of output. An example of the first line is given below:

$OUTREC Ver7.50.2426 NGPS32 Forward Normal

The output format is shown below. Note that certain entries may not always appear, depending on which processing options were used. See Section 2.5, on Page 61 for help selecting the output level.

Out { Tim: even_sec_time corrected_time WkNum

GPS seconds of the week, week number

Geo: latitude longitude height anthgt

Degrees minutes seconds, metres

Loc: d-east d-north d-height v-east v-north v-height

Local level pos+vel, metres, m/s

Sta: quality amb_drift dd_dop pdop hdop vdop

1-6, cycles/sec, DOPs

Rms: L1Rms CARms P1Rms D1Rms L1Std CAStd D1Std

 

m, m/s; RMS of resid, Std. dev. of meas.

Var: cee cnn czz cve cvn cvz cpos

Position + velocity variance + trace with

 

ppm, m^2, m^2/s^2

Flg: S/K L/F NumGps NumGlonass SolType

(S)tatic, (K)inematic, f(L)oat amb.,

 

(F)ixed amb.; SolType: (S)-SF carrier,

 

(D)-DF carrier, (I)-IonoFree,

 

(R)-RelIono, (C)-C/A Only

Cov: cne cze czn cvne cvze cvzn

Position and velocity covariance

Ecf: dx dy dz

ECEF baseremote vector

Acc: ae an au

Local level accelerations (m/s2)

Gln: TimeOffset ToffSd NGps NGln

m

}

 

A numerical example is also given:

Out { Tim: 343277.000 343276.999962535 1272

Geo: -21 10 09.16196 149 11 00.34808 58.9045 0.000 Loc: -2.454 18.834 0.804 -0.002 0.022 0.045

Sta: 4 0.118066 2.59 1.55 1.19 1.00

Rms: 0.0060 0.545 0.000 0.028 0.0379 4.200 1.050

Var: 5.89495e-001 7.70540e-001 4.04788e+000 2.80134e-001 3.47242e-001 9.18255e-001 5.40791e+000

Flg: K L 7 0 I

Cov: 3.91145e-002 3.03102e-001 5.10459e-002 1.38708e-002 5.8769e-002 6.98362e-004 Ecf: -5.228 5.976 17.272

Acc: -0.020 0.037 0.038 Gln: 0.000 1000000.0000 0 0

}

7.4.4FBV & RBV Files

Binary value file provide additional baseline and satellite output statistics, which are mostly used for plotting. An FBV/RBV file will be created when the multi-base processing is being performed, or when the Write MB binary values/satellite residuals option is enabled. See Section 2.5, on Page 61 for help.

FBV/RBV files contain the following:

For each baseline:

GrafNav / GrafNet 8.10 User Guide Rev 4

219

Chapter 7

File Formats

 

 

i.Code, carrier and Doppler RMS values

ii.Code, carrier and Doppler SD values

iii.Code and carrier phase separation values

iv.DOP values

v.Ambiguity drift

vi.Effective weighting

For each satellite:

i.PRN

ii.Baseline

iii.Rejection + base satellite flags

iv.Code, carrier and Doppler residual values

v.Code, carrier and Doppler SD values

Export these files to ASCII in GrafNav via the Export Binary Values feature. See Section 2.7.4, on Page 111 for additional information.

220

GrafNav / GrafNet 8.10 User Guide Rev 4

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