After the successful Falcon Heavy launch earlier this week, it appears that the Deep Space Atomic Clock (DSAC) is now scheduled to go up in June 2018 on a Falcon Heavy carrying the US Air Force STP-2 test payloads. https://www.nasa.gov/feature/goddard/2018/nasa-tests-atomic-clock-for-deep-space-navigation
For a fun video about this project suitable for non-time-nuts, see: https://www.nasa.gov/mission_pages/tdm/clock/sammy-the-second.html -- Bill Byrom N5BB On Tue, Mar 21, 2017, at 11:36 PM, Bill Byrom wrote: > NASA's Deep Space Atomic Clock test mission is moving toward a late-2017 > launch (don't all projects slip?). The DSAC was just integrated with the > spacecraft. The clock uses a ~40.5 GHz hyperfine transition of mercury > ions. This steers an ovenized crystal USO (Ultra Stable Oscillator) from > FEI with 1-100 sec stability <2e-13 and drift <1e-10/day. A GPS receiver > is also on board: > https://www.jpl.nasa.gov/news/news.php?feature=6784 > > NASA information about the DSAC applications at: > https://www.nasa.gov/mission_pages/tdm/clock/index.html > > Expected DSAC performance (2014 paper). This paper claims an estimated > Allan Deviation of <1e-14 (perhaps 3e-15) at a one day interval when in > space: > https://www.researchgate.net/publication/260036335_Expected_Performance_of_the_Deep_Space_Atomic_Clock_Mission > > > Here are the latest two papers I can find (from Feb 2016): > > ** Deep Space Atomic Clock Technology Demonstration Mission Onboard > Navigation Analog Experiment: > https://www.researchgate.net/publication/293648952_Deep_Space_Atomic_Clock_Technology_Demonstration_Mission_Onboard_Navigation_Analog_Experiment > > ** Preliminary Investigation of Onboard Orbit Determination using Deep > Space Atomic Clock Based Radio Tracking: > https://www.researchgate.net/publication/293648187_Preliminary_Investigation_of_Onboard_Orbit_Determination_using_Deep_Space_Atomic_Clock_Based_Radio_Tracking > > -- > Bill Byrom N5BB > > ----- Original message ----- > From: Gregory Beat <w...@icloud.com> > To: time-nuts@febo.com > Subject: [time-nuts] True Time Nut Mission: NASA's Deep Space Atomic > Clock (DSAC) > Date: Tue, 12 Jan 2016 17:31:26 -0600 > > Upcoming Event: Deep Space Atomic Clock > Jan. 14, 2016, at 7 p.m. PT (10 p.m. ET, 0300 UTC) > You can watch this event via USTREAM: http://www.ustream.tv/NASAJPL2 > > Speakers: > Todd Ely, DSAC Principal Investigator, JPL > Allen H. Farrington, DSAC Project Manager, JPL > http://www.nasa.gov/mission_pages/tdm/clock/clock_overview.html#.VpWMgK9OKK0 > Atomic clocks are an integral, yet almost invisible component of modern > life. > For space exploration, they have been the foundational frequency > standard for NASA's Deep Space Network. NASA's Deep Space Atomic Clock > (DSAC) Technology Demonstration Mission, led by the Jet Propulsion > Laboratory, has been maturing the latest Atomic Clock technologies into > a smaller package, suitable for installation on a variety of deep space > probes to enhance navigation precision and gravity science across the > solar system. > ============ > DSAC is scheduled for launch in mid-2016. > Satellite being built by Surrey Satellite Technologies USA, Englewood, > CO > > > Sent from iPad Air > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.