## GLONASSThe data are placed in files called Older data file (1994-2002) of satellite health status you can find here: health_a.glo
Organization of
Organization of satellite health drop-outs file:
In the file
Organization of almanac data:
We provide satellite almanac data as received from GLONASS satellites. You should find the almanac in The file consists of two parts: - Header
- Satellites data
***** 1) HEADER ***** The almanac file begins with two lines. The first line contains date and time when almanac was received and the second line contains variable T/c. T/c System time offset (to UTC-SU) Example: ALMANAC was received on 14 Jan 1994, 14:42:24 UTC-SU T/c = -0.00001628 ALMANAC was received on 24 Nov 1993, 22:51:28 UTC-SU T/c = -0.00001559 ***** 2) SATELLITES DATA ***** Satellite data begin with a keyword "ALM:". Satellites are distinguished from each other by an empty line. N Current day in the four year period (and a readable form of date) units [days]; range (1..1461) n Satellite number range (1, 24) H/n Frequency number range (1..24) lambda/n Longitude of ascending node units [semi cycle]; range (+-1) t/lambda_n Ascending node passing time units [s]; range (0, 44100) i/n Inclination units [semi cycle]; range (0.35 +-0,067) T/n Revolving period units [s]; range (43200 +-3600) DELTA_T_DOT/n Time change of period [s/orbit] epsilon/n Eccentricity [dimensionless]; range (0, 0.03) omega/n Perigee argument units [semi cycle]; range (+-1) tau/n Satellite time offset (to system time) units [s]; range (+-1.9ms) C/n State of satellite with an explanation (GOOD, BAD) behind [dimensionless]; values (0, 1) Example: ALM: N = 744 ( 13 Jan 1994 ) n = 1 H/n = 23 lambda/n = -2.98002243041992E-0001 t/lambda_n = 24137.96875 i/n = 3.60543823242187E-0001 T/n = 4.05441582031250E+0004 DELTA_T_DOT/n = -6.10351562500000E-0005 epsilon/n = 6.56127929687500E-0004 omega/n = -9.80529785156250E-0001 tau/n = 1.18255615234375E-0004 C/n = 1 (GOOD) N = 744 ( 13 Jan 1994 ) n = 2 H/n = 5 lambda/n = -4.13681030273438E-0001 t/lambda_n = 29088.43750 i/n = 3.60583877563477E-0001 T/n = 4.05440605468750E+0004 DELTA_T_DOT/n = -6.10351562500000E-0005 ...etc. |