Author Topic: Navigation Technology Satellite-3 (NTS-3)  (Read 3230 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

Offline beidou

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« Last Edit: 11/23/2017 10:46 PM by beidou »

Offline beidou

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Re: Navigation Technology Satellite-3 (NTS-3)
« Reply #4 on: 11/23/2017 10:49 PM »
Quote
2. BACKGROUND


2.1 NTS-3 builds upon 40 years of Global Positioning System (GPS) developments and is expected to help shape the future of satellite navigation capabilities. NTS-1 and NTS-2 were flown in 1974 and 1977 respectively, and these experimental satellites qualified both the rubidium and cesium clocks that form the backbone of today's modern GPS architecture.

3. DESCRIPTION OF INTEREST

3.1 The United States Air force is seeking interested parties on an integrated space-based experiment for advanced GPS technologies that are resilient in contested environments. The integrated experiment contains both a space payload and a ground control segment that together increase the resiliency of the entire GPS architecture. The Government is interested in space payload and ground control segment design and fabrication; assembly, integration and test (AI&T); and follow-on support through launch and Government led on-orbit operations. Additionally, the Government is interested in an integrated space-based experiment that achieves Technology Readiness Level 6, via ground testing, no later than 2021 to support a launch in the 2022 time frame. AFRL integrated space experiments are designed for a one (1) year threshold and three (3) year objective on orbit mission life from launch and follow a proto-qualification ground test strategy for launch and space environment compatibility. On-orbit operations are normally performed by the Government.

3.2 The ground segment is envisioned to utilize the Multi-Mission Space Operations Center (MMSOC) open architecture standard, as well as the Air Force Satellite Control Network (AFSCN) for primary direct, secure communications. The Government is specifically interested in ground control segment information tailored to controlling and generating the GPS payload Signals in Space (SIS) as well as advanced capabilities outlined in the objectives below. Information pertaining to MMSOC implementation and spacecraft Tracking Telemetry & Control (TT&C) is not required in the response and should be included only to provide context or illustrate the complete segment. The Air Force is not interested in responses for advanced User Equipment (UE) receiver information at this time.

3.3 Space Payload Segment:
Objectives
NTS-3 will experiment with technologies to enable the broadcast of an increased number of signals on L1.
NTS-3 will experiment with technologies to improve Satellite Navigation anti-jam performance by overcoming and avoiding jamming while maintaining signal accuracy.
NTS-3 will experiment with technologies to counter spoofing.
NTS-3 will explore modifications and enhancements to all layers (carrier, code and data layers and sublayers) of the Positioning, Navigation and Timing (PNT) signal to enhance resiliency and improve PNT performance.
NTS-3 will investigate assured-by-design technologies to enhance GPS mission resiliency in a cyber-contested environment.
NTS-3 will investigate modern processes to manage cyber risks.
NTS-3 will experiment with technologies to maintain signal accuracy after loss of contact with the ground control segment.
NTS-3 will investigate methods to improve on-board GPS signal integrity detection and notification to users.
NTS-3 will demonstrate improved accuracy with advanced clock and ephemeris correction technologies (ground system must be capable of measuring improvements).
NTS-3 will demonstrate flying to the ephemeris of an unchanging navigation data message (ground system must be capable of measuring improvements).
NTS-3 will measure the space and spacecraft environmental effects on next generation (improved performance and/or improved manufacturability) atomic clock technologies.
NTS-3 will investigate antenna configurations to ensure GPS availability and signal strength for terrestrial and space users.


3.4 Ground Control Segment:
Objectives
NTS-3 requires a ground segment capable of achieving the above space payload segment objectives.
NTS-3 will investigate alternate methods to reconstitute the ground control segment in the event of an attack.
NTS-3 will experiment with automated/lights-out operations.
NTS-3 will demonstrate space vehicle command and control through commercial ground antennas.
NTS-3 will demonstrate compatibility with the Enterprise Ground System (EGS) standards and the Joint Space Operations Center (JSpOC) Mission System (JMS).
NTS-3 will investigate modern processes to manage cyber risks.

https://govtribe.com/project/navigation-technology-satellite-3

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