SOW_GPS_Constellation_Signal_Simulator.docx

STATEMENT OF WORK

GPS Constellation Signal Simulator June 08, 2016

PR: 4200593195

BACKGROUND:

NASA’s Goddard Space Flight Center has an on-site Global Positioning System (GPS) test facility called the Formation Flying Test Bed (FFTB), which is used to test and verify a spacecraft’s ability to determine its position in relation to other spacecraft or in relation to the Earth. This facility, managed by Code 596 (Components and Hardware Systems Branch), has been used to test the on-orbit GPS performance for several mission and experiments. It is also used to test GPS performance of GPS receivers from other Government agencies as well as the private sector. Most recently, this hardware-in-the-loop test facility has supported the MMS and GPM spaceflight missions and is currently verifying the orbit determination algorithms and circuitry for the NICER/SEXTANT and GEDI missions. The FFTB makes avid use of GPS constellation signal simulators and other tools to generate the authentic RF environments required to test these spacecraft subsystems.

SCOPE:

Vendor shall modernize old STR4760 Spirent GPS L1/L2 simulators with new GSS9000 Spirent Simulators capable of generating the RF signals for the following Global Navigation Satellite Systems (GNSS):

· GPS L1

· GPS L2

And two of the following systems:

· GPS L5

· GLONASS L1

· GLONASS L2

· Galileo E1

· Galileo E5ab

· Galileo E6

· BeiDou B1

· BeiDou B2

In addition, the vendor shall provide the following optional units:

· Option 1: Vendor shall provide a distribution unit and integrate it on-site with the GSS9000 simulators, part number Fed-INT3.

· Option 2: Vendor shall provide a GPS L5 license key for GSS900, part number 9000-3103.

*The technical requirements listed in the Requirements section below shall be met.

TECHNICAL REQUIREMENTS:

1. Vendor shall provide a GPS/GNSS constellation signal simulator that shall be referred to as “the simulator.”

2. Each GNSS frequency RF output shall support a minimum of 16 (sixteen) simultaneous unique GPS satellites.

3. Each simulator unit shall be expandable to simultaneously simulate all of the frequencies detailed in the SCOPE section above.

4. The vendor shall provide all necessary simulator specific hardware (control unit, monitor, power adapters, and simulator-to-simulator cables) as required for normal everyday use.

5. The simulator shall provide all necessary code to create LEO, GEO, and HEO orbits about the earth with altitudes including the range of 1 to 24 earth radii.(0 - 95,000 miles above sea level)

6. The simulator shall provide all necessary code to control, modify and save to a file the aforementioned orbits.

7. The simulator shall be able to generate binary files of orbital scenarios that are compatible with and re-playable on both the STR-4500 and STR-6700 simulators.

8. The simulator shall be able to produce scenarios for three-week duration with no frequency or phase discontinuities in the RF environment.

9. The simulator shall accept a 10 MHz reference frequency with which it shall synchronize its internal oscillator.

10. The simulator must support the Spirent SimREMOTE interface so that it is compatible with the established FFTB infrastructure for real-time commanding of hardware-in-the-loop simulations.

DELIVERABLES AND/OR DELIVERY SCHEDULE:

1. Vendor shall provide all manuals required to knowledgeably interface to the hardware and all manuals needed to knowledgeably command the simulator.

2. The simulator shall be delivered to the following point of contact:

Receiving Officer Goddard Space Flight Center Building 35, Code 279 Greenbelt, Maryland 20771 Hours: 7:30am to 3:30pm

Government-Furnished Equipment and Government-Furnished Information: There shall be no Government Furnished Equipment (GFE) and no Government Furnished Information (GFI) provided to the vendor as part of this purchase.

Place of Performance: Manufacturing of the simulator shall not take place at NASA.

Period of Performance: N/A