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GPS Frame Structure


This GPS tutorial covers GPS system basics, GPS frame structure, applications and also provide link to GPS module/chip/components manufacturers.It covers difference between GPS vs AGPS and GPS vs GLONASS.
GPS vs AGPS  GPS Frame Structure  GPS vs GPRS  GPS Basics Tutorial  GPS Antenna  GPS Receiver Module  GPS Satellite  GPS Tracking System 


The message frame is usually of duration 0.6 sec. It contains 24 bits of data and also 6 parity bits. The GPS frame structure is composed 10 subframes. It carry 300 bits, which includes 240 data bits and 60 parity bits. The frame frequency is about 50 Hz or has rate of 50bps. Each satellite transmits 5 sub-frames in 30 seconds.

 GPS frame structure

The GPS frame starts with telemetry word used as preamble, which provides details of the satellite. The GPS system time is referred as 'Z count' and is carried in the handover word(HOW). HOW is followed by eight data words with parity bits.

Subframe-1 carry information to correct the satellite clock. Subframe-2 and subframe-3 provides ephemeris data for the satellites. Subframe-4 and sunframe-5 send the Almanac data.

GPS modules,receiver chip manufacturers

GPS system components manufacturer, READ MORE.

Frame structure of wireless standards, technologies

Frame structure of various wireless standards/technologies are mentioned below. It include WiMAX, WLAN, Zigbee, GSM, GPRS, UMTS, LTE, TD-SCDMA, GPS, SDH, 11ac WLAN, AMPS, Ethernet, VLAN etc.

WiMAX physical layer Frame Structure as per 802.16d and 802.16e standards
WiMAX MAC layer Frame Structure as per OFDM 802.16d standard
Zigbee RF4CE Frame Structure
Zigbee physical layer Frame Structure
Zigbee MAC layer Frame Structure
GPRS Frame Structure
GPS Frame Structure
LTE Frame Structure
TD-SCDMA Frame Structure
UMTS Frame Structure
SONET Frame Structure
SDH Frame Structure
802.11ac PHY Frame Structure
802.11ac MAC layer Frame Structure
WLAN Frame Structure as per 802.11a,11b,11n,11ac standards
AMPS Frame Structure
Ethernet Frame Structure
VLAN Frame Structure
GSM Frame Structure

RELATED LINKS

satellite tutorial
Satellite Terminology
Satellite modem Design


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