GPS Modernization Stalls - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

GPS Modernization Stalls

With the optimism of college-bound seniors touring the Ivy League, GPS managers have been weighing options to dramatically change the GPS constellation. Now, after studying the costs, considering the benefits, and assessing the funding climate, officials have made the starkly fiscal decision to stick close to home and take a few extra years to finish. 

With the optimism of college-bound seniors touring the Ivy League, GPS managers have been weighing options to dramatically change the GPS constellation. Now, after studying the costs, considering the benefits, and assessing the funding climate, officials have made the starkly fiscal decision to stick close to home and take a few extra years to finish. 

Although the final decisions will not be made until sometime this spring, proposals for a distinctly different type of GPS constellation appear to be off the table, sources tell Inside GNSS. The plan now appears to forego any major shift in the design of the satellites such as those proposed in Lower Cost Solutions for Providing Global Positioning System (GPS) Capability, an Air Force report delivered to Congress last April. 

The established course of modernization will proceed largely unchanged, say sources, but it will take longer to build and launch the GPS III satellites and add the new signals. Full implementation of the new military M-code, for example, will be pushed back roughly four years at least, noted one source. Those waiting for the new civil signals will also have to be patient. 

The current course of action will likely raise the total cost of the modernized system although the higher costs will be spread out over time in a way that fits more appropriately into budgets constrained by sequestration and the overall post-war downsizing taking hold at the Pentagon. 

“We’ll pay a unit price that’s a little higher, but just like when you buy your car on payments, you pay more for the car but you have cash flow management,” Maj. Gen. Robert McMurry, director for Air Force space acquisition told reporters during a briefing on the military space budget. 

The fiscal year 2015 (FY15) budget McMurry was describing reflects the decisions so far. The FY15 request for money to procure GPS III satellites is just $292.397 million — down dramatically from the White House’s request for $477.598 million in FY14 and roughly half of the $531 million the White House projected it would need for the program just last year. It is less even than the $450.598 million allocated by Congress. 

The administration is also asking $212.571 million for GPS III development, somewhat less than the $221.276 million requested last year and only slightly smaller than the $215 million that was projected to be needed last year. The request is a bit more than the $201.276 million Congress appropriated for FY14. 

The request to procure Block IIF satellites is about the same as last year — $52.09 million — but the new ground control segment faces al reduction. Whether it is a big or small cut depends on how you look at it. The White House is asking for $299.76 million in FY15 for the Next Generation Operational Control System or OCX. That is down sharply from its $383.5 million request last year and the congressionally approved FY14 amount of $373.5 million. 

In the projections that accompany each budget, however, the White House last year only anticipated asking for $303.5 million for FY15. In fact, both the FY14 and FY15 budgets project falling GPS allocations for the next several years. This is despite the fact that the program has been experiencing delays and challenges — the sort of things that normally add to the cost. How these two trends will mesh in the end is unclear. 

Where it had planned to buy two GPS IIIs this year, the Air Forces now plans to buy only the ninth in the series and put down money for long lead items on Space Vehicle 10 (SV10). It will then buy just one new satellite next year and three each year for the next three years, according to McMurry. 

The launches will be stretched out a bit as well. Five GPS missions will see their booster procurement moved past 2017, said McMurry. That has implications for Department of Defense (DoD) plans to introduce more competition into the launch procurements. 

“Those five will still be available for competition,” he said. “It’s to be determined how we’ll do that competition. It will be part of the phase two, and they’re working on that strategy.” 

The long life of the existing satellites is making it possible to find savings without undermining the quality of the GPS system, officials said. 

“(The) satellites are living longer than we predicted so we didn’t need to replenish those as fast as we originally planned. And it made no sense to spend that money if we didn’t need the satellites,” said Troy Meink, deputy under secretary of the Air Force for space. 

The Constellation 
Less clear is how many satellites the Air Force plans to have in the constellation over the long run. 

The FY15 budget “reprofiles Global Positioning System, GPS III, to meet constellation sustainment demands,” said Under Secretary of the Air Force Eric Fanning. 

“Sustainment,” however, does not necessarily mean supporting the constellation in its current configuration, which stands at 31 satellites plus spares. While having more satellites is advantageous to those on the ground, it is not strictly necessary according to Air Force mandates. 

“The requirement is 27 satellites to maintain 24,” McMurry told the audience at a March 7 breakfast on Capitol Hill sponsored by the Mitchell Institute. “I think our approach will be to absolutely assure that requirement, which meets that mandated performance, but in doing so I will expect that we’ll, in reality, maintain a slight surplus to that as we move on.” 

“It is clear that they are going to stay with the ‘enhanced 27,’ which is 27+3 for as long as they can,” said a source familiar with the issue. “And even if for some reason those (satellites) that are turned on now drop out, they’ve got as many as five that they can turn back on.” 

Those backup satellites just have “to last until the next launch,” said the source, suggesting it is realistic that the Air Force will be able to keep the number of satellites up even though the spacecraft have been operating far past their design lives. 

The question is whether the next launch, or launches, can happen fast enough. The existing satellites were launched in clusters and are therefore at risk of failing in groups as they age out. Will the Air Force have the satellites it needs and the lift capacity required to deal with a sudden, rapid loss of the older spacecraft? 

It appears that the answer may be “Yes.” 

Dual Launch After All 
Inside GNSS has learned that, even though the Pentagon has slashed the funding for dual launch, plans are in the works to enable the lighter payloads and dual-launch capability needed to rapidly refresh the constellation. 

The United Launch Alliance, a 50/50 joint venture between Lockheed and Boeing, is stepping in to finish the work. “ULA is funding the launch vehicle development work that will enable dual launches of GPS III and other potential satellites, with a planned first launch capability in 2017,” the company said in a written response to a question from Inside GNSS

And the Air Force will continue to fund the technology needed on the satellites to make dual launch possible. 

“We have maintained the development of dual-launch capability within the satellite line,” McMurry said. “The satellite itself will have the dual transponders and radio frequencies in place so that, if you launch two of them together, you could communicate with both of them independently.”

Slimmer Sats in a Pinch
The satellites might still be too heavy to launch two at a time unless some other changes are made. 

To address that, said a source, military managers are planning to build flexibility into the GPS III satellites that will enable the service to drop the Nuclear Detonation Detection System or NDS payload from the GPS III satellite if necessary. 

“They are going to ensure that they have the option to fly GPS III without the NDS,” said the source, adding that, without NDS, “should there be the requirement . . . to rapidly replace the constellation, they will actually be able to launch two.” 

The built-in flexibility also means the GPS program will not have to plan around any delays in the new NDS payload — which is on schedule but still needs a good deal of testing, the source said. 

Dual-launch capability and potentially lighter satellites are a variation on a far more ambitious proposal to develop a stripped-down version of the GPS III spacecraft that would not carry the NDS and provide fewer signals. These smaller satellites would likely have been used in combination with some of the larger, regular GPS spacecraft. 

The austere NavSats or “NibbleSats” were cheaper to build and could have been launched at least two at a time — perhaps even in clutches of three or four — dramatically reducing the cost of maintaining the constellation. But the proposal was set aside after hitting a number of stumbling blocks involving funding and contract management, sources told Inside GNSS

“I think the pressure to reduce the cost of the satellite is very much there,” said an expert. “Obviously anything the Air Force can do to drive the cost of the satellite down — I think they’re still alert to those opportunities. But I think the Congress has made it very difficult for them too create a ‘new start.’”

It is not only hard to get money for new starts (new programs), the rules governing the seemingly endless rounds of Congressional budget extensions mean the program could have become tangled in delays, said Stan Collender, national director of financial communications for Qorvis Communications and an expert on the federal budget. 

“Under a continuing resolution,” said Collender, “new starts are prohibited.” 

Moving to small satellites would also have been such a big change that it likely would have required the Air Force to recompete the GPS III contract. New procurements face a long process fraught with complexities and the uncertainties created whenever new contractors enter a program where legacy satellites have been in place so long that they are frequently referred to jokingly as being “old enough to vote” — that is, have reached 18 years of age. 

The prospect of reopening the contract is why “NavSats, small sats, little sats — that stuff is off the table,” said a source, who has been following the issue. 

Thrifty Innovation
That does not mean the GPS III program will proceed without a few enhancements. 

Col. Bill Cooley, director of the GPS Directorate, said the Air Force is “looking at a design turn” and is examining using better solar panels and traveling wave tube amplifiers or TWTAs (TWEEtas) which could reduce power requirements. 

Changing the batteries is also under consideration, according to sources. One expert pointed out that some of older battery technology is not even available anymore. Another source said that lithium-ion batteries were being considered. 

“The decisions are in the process of being made,” Cooley told Inside GNSS. That decision process may be playing a role in the delay of the first GPS III satellite, which is now not expected to be ready until FY16. 

The design of the first satellite is supposed to be a template of sorts for the rest, and Cooley made it clear to the Mitchell Institute audience that he wanted the design to be “repeatable.” 

Right now, however, interference problems within the satellite’s navigation payload have to be resolved. The problems in the payload, which is being build by Virginia-based Exelis, have already been cited as a reason for delays in the program. 

The GPS IIIs must generate and transmit eight signals — legacy military P-code on L1 and L2 frequencies and civil C/A-code on L1, as well as the new dual-frequency M-code, and civil L1C, L2C, and L5 signals. In order to keep the timing and everything synchronized, there is “one critical box” involved in their generation, said Cooley. 

“There’s a whole bunch of techniques you can use,” Cooley told Mitchell Institute attendees. You can use absorptive material, he said, redesign some of the boards or separate the signals by putting them in separate boxes. “All options are on the table.” 

Sources confirm that the Air Force seems to have workable solutions in hand. Although those solutions may need extensive testing, the potentially two-year delay could also give the program time to work in some of the innovations mentioned previously. Program managers may also just be working hard to get the most out of the new satellites. 

“The GPS IIIs have a design life of 15 years,” said Cooley. “That’s a real challenge — to get 15 years in that harsh environment. We hope that they will last much longer. We hope that we can get a satellite that can vote and drink and all those kinds of things.” 

What the changes, delays, and development problems mean for GPS III prime contractor Lockheed Martin is unclear. 

“Over the next few weeks we will review the budget in detail to understand the specific impacts to our business,” the company said in a written response to Inside GNSS. “We look forward to working with the administration and Congress over the coming months as budget discussions continue.” 

OCX and Civil Money
What the delay in the first GPS III satellite means to Raytheon is that the OCX prime will have more time to work on ground segment modernization that already slipped behind schedule, said McMurry, who attributed slippage in the initial GPS III delivery as the biggest reason for a new delay in the OCX program. 

OCX program managers may get more time still if all the money from the civil side of the GPS program does not come through. 

As noted earlier, the White House scaled back their FY15 defense budget request for OCX to $300 million This is just under the $303.5 million that was projected to be needed this year though the program has been experiencing difficulties. This is the request for the Defense Department. OCX also gets part of its money from the U.S. Department of Transportation (DoT), and a long string of underpayments from DoT has put GPS program managers in a position where they will be forced to reprogram OCX, adding some six months to the schedule and tens of millions to DoT’s bill, according to an expert with knowledge of the issue. 

The White House gave DoT the responsibility for funding those parts of the GPS program needed by civil users, and DoT handed the Federal Aviation Administration (FAA) the actual funding task. 

The FAA has largely failed, however, to persuade Congress to allocate the money for the civil funding. This has forced the agency, which has cost overruns on other programs, to short its payments to DoD for the last several years. 

The FAA is now trying to make up for those too-small payments but “it’s not pretty,” said the source, who spoke on condition of anonymity. 

The Administration’s FY15 budget request for civil funding actually jumped from the $20 million requested last year to $27 million — better, but still a far cry from the $40 to $50 million that was supposed to be allocated each year for five years. Even so, if FAA convinces Congress to approve the whole request it will be a dramatic improvement over the scant $6 million it got for FY14. 

Failure to win over lawmakers could have significant consequences. 

Up to now the Air Force has been able to manage around the budget shortfalls and keep things more or less on track. With sequestration and other cuts coming out of DoD space programs, GPS program managers are no longer in a position to finagle funding for civil capabilities. 

The source told Inside GNSS that, should the FAA fail to secure adequate monies, the OCX program to will have to be stretched out some six months at considerable expense — money that FAA will also be expected to make up. The total bill for what FAA owes plus the added cost of delay would top $100 million said the source — nearly four times the current budget request. 

DoD and FAA will have to work together pretty closely to manage during these austere times, said the source. “When you get cut to the bone you have to work pretty closely just to survive.” 

Sequestration Looms 
The budget crunch could get even worse if sequestration is applied without changes in 2016. 

Military officials made it clear that they are assuming sequestration will not resume in full in 2016, as is now the law. If it should reemerge, said Fanning, “we would be unable to procure one of the three GPS III satellites planned in FY17.” 

Still unclear is how the launch rate or other aspects of the program would be affected, but it is clear, said Collender, that budget politics mean sequestration is likely to remain a factor. He estimated a 3-out-of-4 chance that the cuts will return in full force in the 2016 budget. 

“It will be a presidential year,” he said. “You’ll have Republicans that don’t want to be blamed for increasing spending; so, spending cuts might be in place. There’s probably a 75 percent chance that the 2016 sequester stays in place as is.” 

That could force still more changes to the GPS program and perhaps even reopen consideration of a GPS III redesign,experts hinted. Asked what options the Air Force was looking at for the long term, Cooley left the door open. 

“What options are we not looking at?” he said.