logo_db.gif (1248 bytes)
button1off.gif (600 bytes)button2off.gif (568 bytes)button3off.gif (465 bytes)button4off.gif (442 bytes)

Constellations

button5off.gif (444 bytes)button6on.gif (559 bytes)button7off.gif (454 bytes)button8off.gif (413 bytes)button9off.gif (470 bytes)

MSS
Globalstar
ICO
Iridium

Broadband
Teledesic
SkyBridge

Little LEOs
Orbcomm
VITAsat
Leo One USA

GEO
Eutelsat

Navigation
GPS (USA)
GLONASS (Russia)

Weather
GOES (USA)
ATS (USA)
SMS (USA)

   NAVSTAR GPS/Block III - Specs
space.gif (43 bytes)

Technical Specifications

The GPS III architecture study, the first of a three-phase program, will conclude in late 2001. Boeing and Lockheed Martin were each awarded US$16 million contracts for the first phase. The U.S. Air Force plans to award two 26-month program definition and risk reduction contracts to begin hardware development, in 2002. One contractor will be selected in 2004 to complete development and build the satellites. The first of the new satellites is to be launched in 2009, with the entire constellation expected to remain operational through at least 2030.

The USAF wants GPS III to deliver better anti-jam capability, by providing two new high-power spot beams for the military-code (M-code) signals to the L-1 and L-2 channels that service military users. Furthermore, it will have two other channels that provide navigation signals for civilian use in local, regional and national safety-of-life applications for improved position, navigation and timing knowledge. One of the new civil signals is expected to transmit higher power than the other two signals for improved reception worldwide.

NAVSTAR GPS/Block III Satellites

PAYLOAD CAPABILITIES

Types of Services

Navigation

Downlink frequencies

1572.42 MHz and 1227.6 MHz (L-Band)

2227.5 MHz (S-Band)

CORE BUS SPECIFICATIONS

Prime Contractor

 

Platform  
Launch Mass

 

Design Life

 

STRUCTURE

Dimensions (H x W x L)

 

Construction  

POWER SYSTEM

Payload Power (EOL)

 

Solar Arrays

 

Batteries

 

ATTITUDE CONTROL SYSTEM

Stabilization

 


Copyright 2001 - Andrews Space & Technology
Andrews Space & Technology Privacy Statement and Copyright Information