Post a Comment On: SatTrackCam Leiden (b)log

[Image] image: DRDO
In my previous two posts (here and here), I analysed the much discussed Anti-Satellite (ASAT) test by India taking out Microsat-r on 27 March 2019.  Now the story gets a new twist.

Yesterday, Ankit Panda had a scoop in The Diplomat: it turns out that India attempted an ASAT intercept earlier, on February 12, 2019, which ostensibly failed according to US government sources.

Ankit is well sourced within the US Government, and his sources told him that a missile launch was observed on February 12th, which reportedly failed 30 seconds after lift-off.

A NOTAM and Area Warning had been given out for that day by the Indian government, for the "launch of an experimental flight vehicle" (the latter detail mentioned in the NOTAM but not the Maritime Area Warning). The Indian Government later published a bulletin omitting any reference to a missile failure, instead suggesting the succesful test of an "interceptor missile", launched from Abdul Kalam island, against an "electronic target".


 HYDROPAC 448/2019 (63,71)
(Cancelled by HYDROPAC 485/2019)

BAY OF BENGAL.
NORTHERN INDIAN OCEAN.
INDIA.
DNC 03.
1. HAZARDOUS OPERATIONS 0515Z TO 0645Z DAILY
   12 AND 14 FEB IN AREA BOUND BY
   20-48.07N 087-02.23E, 18-07.27N 086-25.02E,
   01-46.62N 087-30.51E, 02-57.91N 093-50.49E,
   18-33.79N 088-46.21E, 20-48.95N 087-06.99E.
2. CANCEL THIS MSG 140745Z FEB 19.

( 080903Z FEB 2019 )


The hazard area from the Area Warning for Feb 12 is very similar to that of the March 27th ASAT test. Compare these two maps, for February 12 and March 27 (the track shown is the groundtrack of Microsat-r, the target of the March 27 ASAT test. The blue and red areas indicated, are the hazard areas from the Area Warnings):

[Image] February 12 Area warning and Microsat-r track [Image] March 27 Area Warning and Microsat-r track.

The hazard areas are virtually indistinguishable, and so is the location of the Microsat-r ground track. Microsat-r clearly was the target ("electronic" or not) of the February 12 attempt as well. Even the pass times are close for both dates: compared to March 27, the Microsat-r pass over Abdul Kalam happend about 1 minute earlier on Feb 12. With the benefit of hindsight, it is all very clear.

Indeed, press reports based on the mentioned Indian Government bulletin give 11:10 am Indian Standard Time (05:40 UT) as the time for the Feb 12 attempt. From the listed time, we can deduce that the virtual intercept would have happend at 271 km altitude, some 12 km lower than the 283 km altitude of the succesful March 27 intercept.

Microsat-r was in a slightly different orbit on February 12th: a slightly more eccentric, but stable 240 x 300 km orbit. During the succesful ASAT test of March 27, Microsat-r was in a slightly more circular 260 x 285 km orbit.

[Image] click diagram to enlarge
An open question is whether the February 12 attempt was a rehearsal and not a real attempt to hit and kill the satellite; or if it was a real attempt but failed. If Ankit Panda's US government sources are correct that the missile failed 30 seconds after lift-off, it would seem a failure, unless the cut-off after 30 seconds was intentional. Another open question is whether the US government was aware on February 12 that it was an ASAT test (see also this Twitter thread by Brian Weeden).

With the February 12th attempt so soon after launch of Microsat-r (January 24th), it would appear that Microsat-r was specifically launched to function as an ASAT target.