It appears that the 50+ year continuous record from the DMSP satellites may be at risk.
From Wiki:
"2016 failure of DMSP 19 without replacement
"On 11 February 2016, a power failure left both the command-and-control subsystem and its backup without the ability to reach the satellite’s processor, according to the US Air Force Space Command investigation released in July 2016 that also announced that DMSP 5D-3/F19 was considered to be ‘lost’. The satellite's data can still be used, until it ceases pointing the sensors towards the Earth. The satellite was the most recent on-orbit, having been launched on 3 April 2014.[8]
"The failure only left F16, F17 and F18 – all significantly past their expected 3–5 year lifespan – operational. F19’s planned replacement was not carried out because Congress ordered the destruction of the already constructed F20 probe to save money by not having to pay its storage costs. It is unlikely that a new DMSP satellite would be launched before 2023; by then the three remaining satellites should no longer be operational."
DMSP has always been at risk. It started a classified USAF program to hide its budget and development from NASA who had a weather satellite program but was mired in bureaucracy and way behind schedule and capabilities. The military needed a weather satellite to support other programs and created a small bird that worked at very low cost.
Once it became known in the 1970’s and NASA was a participant, it grew to a multi ton 7-meter long vehicle; a mouse the size of an elephant designed by a committee.
NASA’s involvement kept the USAF from launching more birds and by 1979 we had but one and it was limping along.
A newer polar orbiting program was recently canceled after billions were spent because of the same issue of political infighting by NASA.
NASA: Need Another Space Agency, because this one ain’t working.