Author Topic: Navigation Technology Satellite-3 (NTS-3)  (Read 2892 times)

Offline beidou

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Navigation Technology Satellite-3 (NTS-3)
« on: 11/27/2015 05:49 PM »
An USAF officer disclosed in a presentation from a recent meeting at Stanford University that the Navigation Technology Satellite-3 (NTS-3) will be launched after 2020, this may fly as a piggyback or hosted payload.

A snippet from the presentation is attached.
« Last Edit: 11/27/2015 09:20 PM by beidou »

Offline beidou

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Re: Navigation Technology Satellite-3 (NTS-3)
« Reply #1 on: 11/27/2015 09:25 PM »
Disclosed in another presentation the launch date will be in 2020-2022.

Offline beidou

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Re: Navigation Technology Satellite-3 (NTS-3)
« Reply #2 on: 06/12/2016 12:06 PM »
Quote
NTS-3, to be launched in the early 2020s nearly 45 years after NTS-2, will demonstrate new technologies and concepts along with experimental components and technologies for all three segments: space, control, and user. Through a combination of development contracts by traditional defense contractors and Small Business Innovative Research contracts, developments of amplifiers, digital waveform generators, antennas, ground systems, and PNT architectures are progressing.

At the heart of the experiment is an On-Orbit Digital Waveform Generator (ORDWG). The ORDWG enables additional experiments with advanced waveforms. AFRL has developed concepts for signal authentication and dynamic spectrum access, as well as building on the satnav waveform literature to consider enhancements such as Binary Coded Subcarrier, enhanced C/A-code, and a military acquisition signal. The AFRL Sensors Directorate and the Air Force Institute of Technology are key partners in developing ground test receivers for waveform experiments that will utilize advanced software defined receivers.

Other components that will be evaluated on NTS-3 include highly-efficient amplifiers utilizing Gallium Nitrite, and other technologies that provide power efficiency and flexibility. Improvements to accuracy and integrity will be evaluated with advanced clocks and on-board ephemeris compensation, with application to resilient PNT.

The NTS-3 space segment will include new components that have never been flown on GPS space vehicles. An advanced antenna system will demonstrate the effectiveness and affordability of high-gain regional power for military users, and the ability to control the beam in near-real time. One of the key experiments with the high-gain antenna is to determine the impact of a steerable beam on phase center bias and variation, for both the users of the high-power signals and the users of the Earth coverage signals.

Ground control segment experiments include high-gain regional antenna operation, use of commercial SATCOM assets for TT&C, placement of cybersecurity protection mechanisms and evaluating integrity enhancement techniques. One key area is emulating the CONOPS for a high-power regional beam request. This will include pointing location, at what elevation angle to turn on the beam, required received power level, duration, time required to initialize the payload in terms of software uploading (if needed), and hardware warm-up (if needed).

AFRL/RV is seeking collaboration from industry, government agencies, and universities in developing experimental concepts and participating in the flight experiment. The NTS-3 flight experiment, with an expected launch in the early 2020s and an experimental phase lasting approximately one year, provides a unique opportunity, the first in 45 years, to conduct space-based technology experiments for PNT, and advance the state of the art for next-generation satellite navigation.
https://www.ion.org/jnc/abstracts.cfm?paperID=3870

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