|
Column
|
Data Category
|
Explanation
|
|
1
|
PRN
|
the satellite vehicle PRN number
|
|
2
|
MJD
|
the five digit Modified Julian Date and the fraction of day at the midpoint of the track
|
|
3
|
BGTK
HHMM
|
hour and minute (in UTC) of the start of the track
tracks begin at 1 second after the minute
|
|
4
|
TRK
SEC
|
the track length in seconds (a full track is 780 seconds)
|
|
5
|
MC-GPS
NS
|
the time difference (measured in nanoseconds) between UTC(USNO MC) and GPS time, referred to the midpoint of the pass via a linear fit
|
|
6
|
SLOPE
PS/S
|
the slope determined via the linear fit to produce MC-GPS (measured in picoseconds per second)
|
|
7
|
RMS
NS
|
the root mean square of the residuals of the linear fit used to produce MC-GPS
|
|
8
|
SAMP
N
|
the number of data points used in the fit to produce MC-GPS
|
|
9
|
EL
DG
|
the elevation (in degrees) of the satellite at the midpoint of the track (data prior to MJD 50846 gives elevation at beginning of track)
|
|
10
|
AZM
DEG
|
the azimuth (in degrees) of the satellite at the midpoint of the track (data prior to MJD 50846 gives azimuth at beginning of track)
|
|
11
|
ION
NS
|
the modeled ionospheric delay (measured in nanoseconds) referred to the midpoint of the pass via a linear fit
|
|
12
|
MC-SATCL
NS
|
the time difference (measured in nanoseconds) between UTC(USNO MC) and satellite time, referred to the midpoint of the pass via a linear fit
|
|
13
|
SLOPE
PS/S
|
the slope determined via the linear fit to produce MC-SATCL (measured in picoseconds per second)
|
|
14
|
TROP
NS
|
the modeled tropospheric delay (measured in nanoseconds) referred to the midpoint of the pass via a linear fit
|