25-09-2005, 23:57
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מומחה לתעופה, תעופה צבאית, חלל ולווינות. חוקר בכיר במכון פישר
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חבר מתאריך: 02.07.05
הודעות: 11,689
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היום - שיגור לוויין GPS 2 משופר
להלן ידיעה שהועברה מלוקהיד מרטין: (אין פנאי לתרגם)
The U.S. Air Force is preparing to launch the first modernized Global
Positioning System (GPS) satellite built by Lockheed Martin [NYSE: LMT]
aboard a Delta II rocket on Sept. 25, from Cape Canaveral Air Force Station,
Fla. The satellite is the most technologically advanced GPS satellite ever
developed and will provide significantly improved navigation performance for
U.S. military and civilian users worldwide.
The satellite, designated GPS IIR-14 (M), is the first in a series of eight
GPS IIR satellites that Lockheed Martin is modernizing for its customer at
the Navstar GPS Joint Program Office, Space and Missile Systems Center, Los
Angeles Air Force Base, Calif.
The modernized series will offer a variety of enhanced features for GPS
users, such as 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 civil users with an
open access signal on a different frequency.
The current GPS constellation of 28 spacecraft includes 12 fully operational
Block IIR satellites, which were developed to improve global coverage and
increase the overall performance of the global positioning system.
The Global Positioning System enables properly equipped users to determine
precise time and velocity and worldwide latitude, longitude and altitude to
within a few meters. Air Force Space Command's 2nd Space Operations
Squadron (2SOPS), based at Schriever Air Force Base, Colo., manages and
operates the GPS constellation for both civil and military users. GPS IIR-M
production occurs at Lockheed Martin facilities in Valley Forge, Pa. The
modernized navigation payload is provided by ITT Industries in Clifton, N.J
נערך לאחרונה ע"י יוסיפון בתאריך 26-09-2005 בשעה 09:08.
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