lkd-aerospace
Inside GNSS: Engineering Solutions from the Global Navigation Satellite System Community
GPS Galileo Glonass BeiDou Regional/Augmentation
Inside Unmanned Systems
Thought Leadership Series

USAF Announces More IIF Delay

Inside GNSS, September 2006

Share via: SlashdotSlashdot   TechnoratiTechnorati   USAF Announces More IIF Delay (Inside GNSS)TwitterTwitter   FacebookFacebook

The GPS Block IIF program continues to lose ground, with first launch of a satellite now projected as no sooner than May 2008 and as late as January 2009 in a “worst case,” scenario, according to the U.S. Air Force. Program costs are also increasing.

As first reported in a news in Inside GNSS’s May/June issue, “technical difficulties” were contributing to the delay in the program, which previously had expected to launch its first new spacecraft in January 2007.

At that time, the schedule slip was projected as being March 2008 at the earliest. Then, in a Selected Acquisition Report submitted to Congress in August, the U.S. Department of Defense reported that “the first Block IIF space vehicle available for launch slipped from November 2006 to January 2009.”

The Air Force attributed the development and production delays with space vehicles 1 - 3 to the following: the complexity of the M-code application specific integrated circuit (ASIC) design; the magnitude of the effort required for assembly, integration and test progress; late subcontractor navigation payload hardware deliveries.

Additionally, according to a statement issued by the Air Force, “Performance deteriorated because of a lack of clear functional organization lines for accountability within the prime contractor’s management chain. However, changes in management and links of control and authority have been implemented. The award fee structure is currently being reviewed by the GPS Joint Program Office.”

The problems are expected to add to program costs. An independent cost estimate was conducted in conjunction with a broader review of the IIF program’s technical and programmatic performance. “As a result of this review, the program is now being managed to a more realistic schedule and is funded at a higher confidence level,” says the Air Force.

Boeing holds about $1.3 billion in contract awards to build the first nine IIF satellites, in addition to a $215-million IIF development contract. The Air Force also expects to order another three of the satellites from Boeing.

Block IIF spacecraft will transmit the new civil GPS L5 signal at 1176.45 MHz, which is expected to get heavy use by commercial aviation because it lies in a protected aeronautical radionavigation services band.

The Air Force also noted that it has seven IIR-M satellites which can be launched in the next three years to ensure the GPS constellation is sustained until the first IIF launch in May 2008.

Copyright 2006 Gibbons Media and Research LLC

Copyright © 2006 Gibbons Media & Research LLC, all rights reserved.

Signals
Trimble
Trimble
FLIR
Jammer Dectector
Applanix
Sensonor
NexNav
CAST
NovAtel
globe Copyright © Inside GNSS Media & Research LLC. All rights reserved.
157 Broad Street, Suite 318 | Red Bank, New Jersey USA 07701
Telephone (732) 741-1964

Problems viewing this page? Contact our webmaster.