GLONASS

GLONASS is a Russian radionavigation satellite system that serves a similar purpose to the U.S. GPS system.

GLONASS uses a series of narrow-band FDMA signals, compared to the wideband CDMA signals used by GPS.

The center frequency of the L1 signals are given by the formula

f_L1(k) = (1602.0 + 0.5625k) MHz, k = -7 .. +6

The L2 signal center frequencies can be derived from the L1 frequencies:

f_L2(k) = (7/9) x f_L1(k)

The bandwidth of the standard precision GLONASS signal is approximately 1 MHz, while the bandwidth of the high precision signal bandwidth is approximately 9 MHz. Both signals are modulated onto the same carrier.

The GLONASS signals are transmitted with a power between 25-27 dBW using right hand circular polarization.

Russia is in the process of upgrading the GLONASS signal structure to use CDMA modulation, essentially identical to the signal structure used for GPS.

The iPhone 4S incorporates a GLONASS receiver, in addition to GPS.

Frequencies
Frequency	Bandwidth	Use	Service	Table
1242.9375 MHz	9 MHz	GLONASS L2 (k=-7)	Radionavigation-satellite	-
1243.375 MHz	9 MHz	GLONASS L2 (k=-6)	Radionavigation-satellite	-
1243.8125 MHz	9 MHz	GLONASS L2 (k=-5)	Radionavigation-satellite	-
1244.25 MHz	9 MHz	GLONASS L2 (k=-4)	Radionavigation-satellite	-
1244.6875 MHz	9 MHz	GLONASS L2 (k=-3)	Radionavigation-satellite	-
1245.125 MHz	9 MHz	GLONASS L2 (k=-2)	Radionavigation-satellite	-
1245.5625 MHz	9 MHz	GLONASS L2 (k=-1)	Radionavigation-satellite	-
1246 MHz	9 MHz	GLONASS L2 (k=0)	Radionavigation-satellite	-
1246.4375 MHz	9 MHz	GLONASS L2 (k=1)	Radionavigation-satellite	-
1246.875 MHz	9 MHz	GLONASS L2 (k=2)	Radionavigation-satellite	-
1247.3125 MHz	9 MHz	GLONASS L2 (k=3)	Radionavigation-satellite	-
1247.75 MHz	9 MHz	GLONASS L2 (k=4)	Radionavigation-satellite	-
1248.1875 MHz	9 MHz	GLONASS L2 (k=5)	Radionavigation-satellite	-
1248.625 MHz	9 MHz	GLONASS L2 (k=6)	Radionavigation-satellite	-
1598.0625 MHz	9 MHz	GLONASS L1 (k=-7)	Radionavigation-satellite	-
1598.625 MHz	9 MHz	GLONASS L1 (k=-6)	Radionavigation-satellite	-
1599.1875 MHz	9 MHz	GLONASS L1 (k=-5)	Radionavigation-satellite	-
1599.75 MHz	9 MHz	GLONASS L1 (k=-4)	Radionavigation-satellite	-
1600.3125 MHz	9 MHz	GLONASS L1 (k=-3)	Radionavigation-satellite	-
1600.875 MHz	9 MHz	GLONASS L1 (k=-2)	Radionavigation-satellite	-
1601.4375 MHz	9 MHz	GLONASS L1 (k=-1)	Radionavigation-satellite	-
1602 MHz	9 MHz	GLONASS L1 (k=0)	Radionavigation-satellite	-
1602.5625 MHz	9 MHz	GLONASS L1 (k=1)	Radionavigation-satellite	-
1603.125 MHz	9 MHz	GLONASS L1 (k=2)	Radionavigation-satellite	-
1603.6875 MHz	9 MHz	GLONASS L1 (k=3)	Radionavigation-satellite	-
1604.25 MHz	9 MHz	GLONASS L1 (k=4)	Radionavigation-satellite	-
1604.8125 MHz	9 MHz	GLONASS L1 (k=5)	Radionavigation-satellite	-
1605.375 MHz	9 MHz	GLONASS L1 (k=6)	Radionavigation-satellite	-

External Links:

GLONASS (Wikipedia)

Poster of GNSS Satellite Signal Structure (NovAtel)

SpectrumWiki