The eighth and final satellite in the modernized Global Positioning System has been delivered
From: Satnews.com
The eighth and final satellite in the modernized Global Positioning System Block IIR (GPS IIR-M)fleet has been delivered to the U.S. Air Force by Lockheed Martin.
The final eight spacecraft, designated Block IIR-M, were modernized to enhance operations and navigation signal performance for military and civilian GPS users around the globe. Lockheed Martin is responsible for launch and flight operations support of the GPS IIR and IIR-M satellites.
There are currently three IIR-M spacecraft in orbit, along with 12 original Block IIR satellites within the overall 30-spacecraft GPS constellation. Each satellite in the Block IIR-M series includes a modernized antenna panel that provides increased signal power to receivers on the ground; two new military signals for improved accuracy, enhanced encryption and anti-jamming capabilities for the military and a second civil signal that will provide users with an open access signal on a different frequency.
The third GPS IIR-M spacecraft was launched successfully on Nov. 17, 2006 and was declared operational on Dec. 12 by Air Force Space Command's 2nd Space Operations Squadron (2 SOPS) at Schriever Air Force Base, Colo., which manages and operates the GPS constellation for both civil and military users.
The fourth GPS Block IIR-M satellite has been delivered to Cape Canaveral to support a late 2007 launch. Remaining satellites delivered to storage are available for launch when requested by the Air Force for constellation sustainment.
The GPS constellation provides critical situational awareness and precision weapon guidance for the military. The worldwide system also supports a wide range of civil, scientific and commercial functions - from air traffic control to the Internet - with precision location and timing information.
Based on the navigation user range error, which measures GPS accuracy, the Block IIR satellites enable properly equipped users to determine precise time and velocity and worldwide latitude, longitude and altitude to within one meter.
The eighth and final satellite in the modernized Global Positioning System Block IIR (GPS IIR-M)fleet has been delivered to the U.S. Air Force by Lockheed Martin.
The final eight spacecraft, designated Block IIR-M, were modernized to enhance operations and navigation signal performance for military and civilian GPS users around the globe. Lockheed Martin is responsible for launch and flight operations support of the GPS IIR and IIR-M satellites.
There are currently three IIR-M spacecraft in orbit, along with 12 original Block IIR satellites within the overall 30-spacecraft GPS constellation. Each satellite in the Block IIR-M series includes a modernized antenna panel that provides increased signal power to receivers on the ground; two new military signals for improved accuracy, enhanced encryption and anti-jamming capabilities for the military and a second civil signal that will provide users with an open access signal on a different frequency.
The third GPS IIR-M spacecraft was launched successfully on Nov. 17, 2006 and was declared operational on Dec. 12 by Air Force Space Command's 2nd Space Operations Squadron (2 SOPS) at Schriever Air Force Base, Colo., which manages and operates the GPS constellation for both civil and military users.
The fourth GPS Block IIR-M satellite has been delivered to Cape Canaveral to support a late 2007 launch. Remaining satellites delivered to storage are available for launch when requested by the Air Force for constellation sustainment.
The GPS constellation provides critical situational awareness and precision weapon guidance for the military. The worldwide system also supports a wide range of civil, scientific and commercial functions - from air traffic control to the Internet - with precision location and timing information.
Based on the navigation user range error, which measures GPS accuracy, the Block IIR satellites enable properly equipped users to determine precise time and velocity and worldwide latitude, longitude and altitude to within one meter.
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