| Description |
Glonass Ephemeris Data
|
| Notes |
|
| Parameter Name |
Data Type |
Description |
| Field Length |
u8 |
56 |
| Descriptor |
u8 |
0x62 |
|
Index
|
u8
|
Index of this field in this epoch. |
|
Count
|
u8
|
Total number of fields in this epoch. |
|
Time Of Week
|
double
|
GPS Time of week [seconds] |
|
Week Number
|
u16
|
GPS Week since 1980 [weeks] |
|
Satellite Id
|
u8
|
GNSS satellite id within the constellation. |
|
Freq Number
|
s8
|
GLONASS frequency number (-7 to 24) |
|
Tk
|
u32
|
Frame start time within current day [seconds] |
|
Tb
|
u32
|
Ephemeris reference time [seconds] |
|
Sat Type
|
u8
|
Type of satellite (M) GLONASS = 0, GLONASS-M = 1 |
|
Gamma
|
double
|
Relative deviation of carrier frequency from nominal [dimensionless] |
|
Tau N
|
double
|
Time correction relative to GLONASS Time [seconds] |
|
X
|
vector3d
|
Satellite PE-90 position [m] |
|
V
|
vector3f
|
Satellite PE-90 velocity [m/s] |
|
A
|
vector3f
|
Satellite PE-90 acceleration due to perturbations [m/s^2] |
|
Health
|
u8
|
Satellite Health (Bn), Non-zero indicates satellite malfunction |
|
P
|
u8
|
Satellite operation mode (See GLONASS ICD) |
|
Nt
|
u8
|
Day number within a 4 year period. |
|
Delta Tau N
|
float
|
Time difference between L1 and L2[m/s] |
|
Ft
|
u8
|
User Range Accuracy (See GLONASS ICD) |
|
En
|
u8
|
Age of current information [days] |
|
P1
|
u8
|
Time interval between adjacent values of tb [minutes] |
|
P2
|
u8
|
Oddness "1" or evenness "0" of the value of tb. |
|
P3
|
u8
|
Number of satellites in almanac for this frame |
|
P4
|
u8
|
Flag indicating ephemeris parameters are present |
|
Valid Flags
|
u16 bitfield |
| Name |
Bit(s) |
Description |
| ephemeris |
0 |
|
| flags |
0 |
|
|