|
|
GPS |
GLONASS |
Galileo |
Beidou | QZSS | SBAS |
|---|---|---|---|---|---|---|
|
Transmission mode |
CDMA |
FDMA (GLONASS-M) CDMA (GLONASS-K) |
CDMA |
CDMA |
CDMA | CDMA |
|
Ranging code |
Each satellite transmits different PRN code |
All satellites transmit same code but at different frequencies |
Each satellite transmits different PRN code |
Each satellite transmits different PRN code |
Each satellite transmits different PRN code | Each satellite transmits different PRN code |
|
Frequency |
L1: 1575.42 MHz L2: 1227.6 MHz |
L1: 1602 MHz (1598-1605 MHz) L2: 1246 MHz (1242-1252 MHz) |
E1: 1575.420 MHz E6: 1278.750 MHz E5: 1191.795 MHz E5a: 1176.450 MHz E5b: 1207.140 MHz |
B1: 1561.098 MHz |
L1 CA: 1575.42 MHz | L1 CA: 1575.42MHz |
|
Standard precision signal |
C/A code transmitted on L1 |
Transmitted in L1 band on frequencies 562.5 kHz apart (channel –7 to + 6) |
OS code transmitted on E1 |
OS code transmitted on B1 |
C/A code transmitted on L1 | C/A code transmitted on L1 |
|
High precision signal |
P(Y) code transmitted on L1 and L2 |
Transmitted in L2 band on frequencies 437.5 kHz apart |
E6 signal at 1278.750 MHz |
Unknown |
N/A | |
|
Coordinate datum system |
WGS 84 |
PZ-90 |
GTRF |
CGCS 2000 (China Geodetic Coordinate System) |
JGS(Japanese geodetic system) | WGS84 |
|
Time system |
GPS Time |
UTC (SU) |
GST |
Beidou System Time (BDT) |
TAI (international atomic time) | SBAS Network Time |