Aerospace and Defense

India Successfully Launches IRNSS-1A
July 12, 2013

India Successfully Launches IRNSS-1A

The IRNSS-1A spacecraft. ISRO photo

India’s Space Research Organization (ISRO) reports that its first Indian Regional Navigation Satellite System satellite (IRNSS-1A), has reached geosynchronous orbit and all subsystems are operating normally.

The spacecraft was launched July 1 on board a Polar Satellite Launch Vehicle, PSLV-C22,  from Satish Dhawan Space Centre, Sriharikota. This is the twenty third consecutively successful mission of PSLV.

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By Inside GNSS
Congress Slashes Civil GPS Funding
June 28, 2013

Congress Slashes Civil GPS Funding

In a set of decisions that could potentially slow GPS modernization both the House and Senate Appropriations Committees this week slashed funding for the civil community’s contribution to the GPS system from the Fiscal Year 2014 (FY14) budget.

The House eliminated the entire amount of the White House budget request for $20 million, which is paid through the Federal Aviation Administration (FAA). The Senate cut a mere $5 million — 25 percent of what had been the requested.

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By Inside GNSS
House Committee Makes Deeper Cuts to FY14 GPS Budget
June 18, 2013

House Committee Makes Deeper Cuts to FY14 GPS Budget

The House Appropriations Committee has made a series of cuts to GPS programs that, if agreed to by the Senate, suggest an overall slowdown in the pace of GPS modernization.

While lawmakers on the House Authorization Committee agreed to the full amount of each of the president’s GPS-related requests, their counterparts on the Appropriations Committee cut a total of just over 9 percent from the total budget request for GPS spacecraft, ground systems, and user equipment.

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By Inside GNSS
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CNAV Tests Begin on GPS L2C and L5 Signals
June 16, 2013

CNAV Tests Begin on GPS L2C and L5 Signals

The U.S. Air Force Space Command (AFSPC ) began testing modernized civil navigation (CNAV) message capabilities on the GPS L2C and L5 signals for the first time yesterday (June 15, 2013).

This first test period is scheduled to continue through July 1 (Julian Day 182), according to a Notice Advisory to NAVSTAR Users (NANU 2013034), although a tentative CNAV test plan shows the tests ending on June 29.

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By Inside GNSS
Air Force Proposes Dramatic Redesign for GPS Constellation
June 4, 2013

Air Force Proposes Dramatic Redesign for GPS Constellation

[Updated June 3, 2013] With the budget vise tightening, top Pentagon managers are readying some potentially dramatic changes to the GPS constellation — changes that promise to lower both the cost of the satellites and the expense of putting them into orbit.  

The first changes would be subtle and are linked to buying the next block of GPS III satellites — a decision that sources confirm will be made by the end of September.  

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By Dee Ann Divis
GPS Civil Funding Request Slashed
May 20, 2013

GPS Civil Funding Request Slashed

Jan Brecht-Clark, director, National Coordination Office for Space-Based Positioning, Navigation, and Timing

With just more than four months to go in the 2013 fiscal year, sequestration and furloughs are taking a bite out of key research and the work of the National Coordination Office (NCO) for Space-Based Positioning, Navigation, and Timing (PNT) — the government nexus for GPS-related policy matters.

The NCO is an interagency organization, explained its director, Jan Brecht-Clark in an emailed response; so, “each individual staff member is subject to furloughs implemented by their home agency as a result of sequestration.”

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By Inside GNSS
GENIUS Workshop: Vulnerabilities of GNSS

GENIUS Workshop: Vulnerabilities of GNSS

The October entry in this EU-sponsored series of free GNSS training workshops concerns GNSS vulnerability. It will take place at the University of Nottingham on October 8, 9 and 10.

The instructors will be Terry Moore, Alan Dodson and Marcio Aquino, all faculty at University of Nottingham Geospatial Institute.

The topics:

GNSS Overview: Position fixing, dead reckoning, space segment and SV blocks, ground control and improvement programs,user segment and applications

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By Inside GNSS
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MUSTER
May 2, 2013

MUSTER

Existing methods for improving the GNSS performance commonly attempt to enhance the signal processing and navigation estimation parts of a single receiver. Such approaches, however, leave unexplored the potential benefits inherent to the integration of data from multiple receivers.

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By Inside GNSS
Air Force Examining Broader Options for Next GPS III Satellite Buy
April 30, 2013

Air Force Examining Broader Options for Next GPS III Satellite Buy

Gen. William Shelton. DoD photo

The Air Force will decide this fall whether to build more GPS III satellites or move to a new generation of spacecraft, the leader of Air Force Space Command told Congress last week.

“We’re on contract right now . . . through (GPS III) satellite vehicle number eight. Satellite vehicles nine and beyond – the acquisition strategy for that – will be debated in the fall,” General William Shelton, commander of Air Force Space Command (AFSPC), told the House Armed Services Committee on April 25.

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By Inside GNSS
GNSS Hotspots | March 2013
March 25, 2013

GNSS Hotspots | March 2013

One of 12 magnetograms recorded at Greenwich Observatory during the Great Geomagnetic Storm of 1859
1996 soccer game in the Midwest, (Rick Dikeman image)
Nouméa ground station after the flood
A pencil and a coffee cup show the size of NASA’s teeny tiny PhoneSat
Bonus Hotspot: Naro Tartaruga AUV
Pacific lamprey spawning (photo by Jeremy Monroe, Fresh Waters Illustrated)
“Return of the Bucentaurn to the Molo on Ascension Day”, by (Giovanni Antonio Canal) Canaletto
The U.S. Naval Observatory Alternate Master Clock at 2nd Space Operations Squadron, Schriever AFB in Colorado. This photo was taken in January, 2006 during the addition of a leap second. The USNO master clocks control GPS timing. They are accurate to within one second every 20 million years (Satellites are so picky! Humans, on the other hand, just want to know if we’re too late for lunch) USAF photo by A1C Jason Ridder.
Detail of Compass/ BeiDou2 system diagram
Hotspot 6: Beluga A300 600ST

1. LATE LAUNCHES
Cape Canaveral and Plesetsk
√ [updated April 1] After three delays, a single GLONASS-M satellite will go up from Plesetsk space center on April 26. The United States will send up SVN66, the fourth GPSIIF satellite— on an Atlas V launcher for the first time—during the early evening of May 15. It had been delayed from March.

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By Inside GNSS
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