NSF award 2511063 · Smithsonian Institution Astrophysical Observatory

MRI: Track 1: Acquisition of Commercial Compact Rack Mount Iodine Optical Clock

Final report due

29 July 2028

in 650 days · The award ends on 31 March 2028.

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Dates this award owes

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Decide about an extension2 Dec 2027in 410 days
award ending 2028-03-31 · Research.gov
This one is ours, not NSF’s.
Extension request15 Feb 2028in 485 days
award ending 2028-03-31 · Research.gov
PAPPG 24-1: “at least 45 days prior to the end date”
No-cost extension notice21 Mar 2028in 520 days
award ending 2028-03-31 · Research.gov
PAPPG 24-1: “at least ten calendar days prior to the end date”
Final report due29 Jul 2028in 650 days
award ending 2028-03-31 · Research.gov
PAPPG 24-1: “no later than 120-days following the end date of the award”
Project outcomes report due29 Jul 2028in 650 days
award ending 2028-03-31 · Research.gov
PAPPG 24-1: “no later than 120 days following the end date”
Award is closed out29 Jul 2028in 650 days
award ending 2028-03-31 · Research.gov
PAPPG 24-1: “financially closed out 120 days after their expiration date”

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How we got this date

NSF lists this award's end date as 31 March 2028.
NSF rules say the final report is due no later than 120 days after that.
So the final report is due by 29 July 2028.

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Award card

Award number: 2511063
Period of support: 15 Apr 2026 – 31 Mar 2028
Amount: $579,171
Awardee: Smithsonian Institution Astrophysical Observatory, Cambridge, MA
Program: Major Research Instrumentation
Directorate: MPS

Abstract

Very-long-baseline interferometry (VLBI) uses many radio telescopes spread across the Earth. It makes the sharpest possible astronomical images. In 2019 the Event Horizon Telescope (EHT) used VLBI to take the first picture of a black hole at the center of a galaxy called M87. A picture of the black hole in our own galaxy, the Milky Way, followed in 2022. Synchronization of telescopes on different continents needs an…

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