by Danny Baird NASA’s Space Communications and Navigation program office
NASA is developing capabilities that will allow missions at high altitudes to take advantage of signals from Global Navigation Satellite System (GNSS) constellations — like GPS commonly used in the U.S. These signals — used on Earth for navigation and critical timing applications — could provide NASA’s Artemis missions to the Moon with reliable timing and navigation data. NASA’s Space Communications and Navigation (SCaN) program is developing the technologies that will support this goal.
SUBJECT: Space Policy Directive 7, The United States Space-Based Positioning, Navigation, and Timing Policy
This Space Policy Directive establishes implementation actions and guidance for United States space-based positioning, navigation, and timing (PNT) programs and activities for United States national and homeland security, civil, commercial, and scientific purposes. This policy complements the guidance set forth in Executive Order 13905 of February 12, 2020 (Strengthening National Resilience through Responsible Use of Positioning, Navigation, and Timing Services), and the intersector guidance for Global Navigation Satellite Systems (GNSS) included in the December 9, 2020, National Space Policy. This policy supersedes National Security Presidential Directive-39 (NSPD-39) of December 15, 2004 (United States Space-Based Positioning, Navigation, and Timing Policy).
By Danny Baird NASA’s Space Communications and Navigation program office
The Artemis generation of lunar explorers will establish a sustained human presence on the Moon, prospecting for resources, making revolutionary discoveries, and proving technologies key to future deep space exploration.
To support these ambitions, NASA navigation engineers from the Space Communications and Navigation (SCaN) program are developing a navigation architecture that will provide accurate and robust Position, Navigation, and Timing (PNT) services for the Artemis missions. Global Navigation Satellite System (GNSS) signals will be one component of that architecture. GNSS use in high-Earth orbit and in lunar space will improve timing, enable precise and responsive maneuvers, reduce costs, and even allow for autonomous, onboard orbit and trajectory determination.
LOS ANGELES AIR FORCE BASE, Calif.–Global Positioning System III Space Vehicle (SV) 04 received United States Space Force’s Operational Acceptance approval on Dec. 1- marking yet another significant milestone for the GPS III program, Space and Missile Systems Center and USSF.
It is the fourth GPS III satellite delivered into the operational constellation in the past 12 months and the second in the past three months. Additionally, this is the first GPS III vehicle delivered to the warfighter through an expedited satellite control authority transfer process, which cuts ten days off the previous operational acceptance timeline.
To further stimulate growth in these areas we’ve launched Space Talent, a free career platform and central resources hub built for the global ecosystem of companies at the intersection of space and tech. With over 9,000 jobs and 550 companies across 50 countries, Space Talent matches credible employers with top talent while providing insights into an ever-expanding range of opportunities. The platform also helps founders experiment, build, and finance new businesses by providing resources and the opportunity to receive up to $1.5M in funding from Space Capital and our affiliates.
The importance of space to the modern world cannot be underestimated, and the U.S. Space Force will be key to defending the ultimate “high ground,” said Space Force Gen. John “Jay” Raymond, the chief of space operations for the new service.
BERN, Switzerland (RUAG Space PR) — With Saturday’s launch of ocean monitoring satellite Sentinel-6, two new Precise Orbit Determination Receivers (PODRIX) from RUAG Space made their maiden flight.
PODRIX achieves a very high, real-time in-orbit accuracy of the satellite’s position in orbit from below one meter to a few centimeters utilizing on-ground post-processing. The high accuracy is achieved through simultaneously processing of multi-frequency signals from the U.S. GPS and European Galileo satellites.
SpaceX launched the GPS III SV4 navigation satellite for the U.S. Space Force on Thursday from the Cape Canaveral Air Force Base in Florida.
GPS III SV4 is part of the U.S. military’s latest generation of navigation satellites for the Global Positioning System. Lockheed Martin built the spacecraft.
The Falcon 9 booster made an on-time liftoff at 6:24 p.m. EST. The navigation satellite was deployed from the rocket’s second stage 1 hour 29 minutes after launch.
The Falcon 9’s first stage successfully landed on the “Of Course I Still Love You” drone ship in the Atlantic Ocean.
SpaceX used a new Falcon 9 first stage for the mission. In September, the U.S. Space Force’s Space and Missile Systems Center (SMC) announced an agreement with SpaceX to launch previously flown first stage boosters on future national security space launch missions.
The Sentinel-6 Michael Freilich spacecraft will soon be heading into orbit to monitor the height of the ocean for nearly the entire globe.
VANDENBERG AIR FORCE BASE, Calif. (NASA PR) — Preparations are ramping up for the Nov. 10 launch of the world’s latest sea level satellite. Since arriving in a giant cargo plane at Vandenberg Air Force Base in California last month, Sentinel-6 Michael Freilich has been undergoing final checks, including visual inspections, to make sure it’s fit to head into orbit.
Update: SpaceX CEO Elon Musk tweeted the Falcon 9 launch was aborted due to an “nexpected pressure rise in the turbomachinery gas generator. No word on when they will try launching again.
A Cygnus resupply ship carrying nearly 8,000 lb of cargo for astronauts aboard the International Space Station (ISS) was blasted into orbit by an Antares rocket on Friday night.
The Northrop Grumman booster lifted off on time at 9:16 p.m. EDT from the Mid-Atlantic Regional Spaceport on Wallops Island in Virginia. The flight followed a scrubbed launch on Thursday due to a software problem with ground equipment.
Cygnus, which is also a Northrop Grumman vehicle, is scheduled to arrive at the ISS early Monday morning.
Results were not as good on Friday night for SpaceX, which suffered its second Falcon 9 abort of the week in Florida. The countdown from the Cape Canaveral Air Force Station was halted two seconds prior to a planned 9:43 p.m. EDT liftoff for an unknown reason.
The rocket is carrying the GPS IIII SV-04 navigation satellite for the Global Positioning System.
On Thursday morning, the launch of a Falcon 9 rocket carrying 60 Starlink broadband satellites from nearby Kennedy Space Center was halted with 18 seconds left in the count due to an out family reading from a ground sensor.
LOS ANGELES AIR FORCE BASE, Calif. (SMC PR) — The U.S. Space Force’s Space and Missile Systems Center Launch Enterprise and Space Exploration Technologies Corporation (SpaceX) recently signed a contract modification to reuse a Falcon 9 first-stage booster – for the first time on a National Security Space Launch mission – starting with the fifth Global Positioning System (GPS)-III satellite, scheduled to launch next year.
LOS ANGELES (Space and Missile Systems Center Public PR) — The United States Space Force (USSF) and the Space and the Missile Systems Center achieved another major Global Positioning System (GPS) milestone on July 27 when the GPS III Space Vehicle (SV) 03 received USSF’s Operational Acceptance approval.
WASHINGTON, (AFNS) — The Space and Missile Systems Center (SMC), in partnership with the National Reconnaissance Office (NRO), competitively awarded two Firm-Fixed-Price, Indefinite Delivery Requirement contracts for National Security Space launch services today to ULA and SpaceX.
“This is a groundbreaking day, culminating years of strategic planning and effort by the Department of the Air Force, NRO, and our launch service industry partners,” said Dr. William Roper, Assistant Secretary of the Air Force for Acquisition, Technology and Logistics. “Maintaining a competitive launch market, servicing both government and commercial customers, is how we encourage continued innovation on assured access to space. Today’s awards mark a new epoch of space launch that will finally transition the Department off Russian RD-180 engines.”