Tuesday, 4 October 2022

PAN is moving back westwards again

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  click diagram to enlarge In September 2021 I wrote a blogpost noting that the enigmatic geosynchronous SIGINT satellite PAN/NEMESIS I (2...
Monday, 3 October 2022

A pass of China's Space Plane

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click to enlarge   China's experimental Space Plane , 2022-093A, imaged over the roof of my house in Leiden in the evening of  October ...
Sunday, 25 September 2022

USA 338, the NROL-91 payload, observed

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NROL-91. Click image to enlarge On 24 September 2022 at 22:25:30 UT , with half an hour delay, ULA launched NROL-91 , a Delta IV Heavy with ...
Wednesday, 21 September 2022

NROL-91: a new (possibly electro-optical) sister ship of USA 290

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  click map to enlarge On 24 September 2022 at 21:53 UT , an ULA Atlas Delta IV Heavy (the last to be launched from Vandenberg) will laun...
Wednesday, 7 September 2022

Kosmos 2558 keeping its orbit close to USA 326 [UPDATED]

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  [updated 9 Sept 2022 20:00 UTC] In a series of previous blogposts ( here , here and here ) I wrote about a cat-and-mouse game going on in...
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Sunday, 14 August 2022

Will China's second 'Space Plane' land on August 15? (UPDATE: No, it didn't)

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Over the past 10 days I have been following the second test flight of China's "Experimental Test Spacecraft" (2022-093A), a....
Saturday, 6 August 2022

The flyby of USA 326 by Kosmos 2558 on August 4: a post-analysis

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click image to enlarge In a previous post I discussed the launch of Kosmos 2558 (2022-089A), a Russian military satellite which was launche...

Observing China's Re-usable Test Vehicle (or "space plane")

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  frame stack. Click to enlarge On August 4 2022 near 16:00 UTC, China launched a CZ-2F from Jiuquan carrying a " re-usable experiment...
Wednesday, 3 August 2022

A stalker and its prey (Kosmos 2558 and USA 326)

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  In my previous post I discussed the newly launched Russian military satellite Kosmos 2558 (2022-089A), that was launched on August 1 int...
Tuesday, 2 August 2022

Kosmos 2558, a Russian inspector satellite targetting the US IMINT satellite USA 326?

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  click image to enlarge On August 1, 2022, at 20:25 UTC, Russia launched a Soyuz 2.1v carrying a military satellite from Plesetsk into a ...
Thursday, 28 July 2022

CZ-5B rocket stage 2022-085B: reentry forecasts

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 (this post is periodically updated when new tracking data become available and have been analyzed) last updated 30 July 19:05 UT    My late...
Thursday, 7 July 2022

A failed US missile test on July 7

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  click to enlarge In the first week of July, two Navigational Warnings appeared (NAVAREA XII 431/22 and HYDROPAC 1811/22) that indicated an...

Rearrangements in the USA 328 - 331 'train'

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  click image to enlarge In front of the 'train' USA 328 to USA 331 launched last month (see previous posts here and here ), thin...
Wednesday, 22 June 2022

Observing newly launched USA 328, USA 329, USA 330, USA 331 and a Falcon 9 debris piece

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The video footage above which I shot last night shows the classified objects covertly launched with the commercial Globalstar FM15 satellite...
Monday, 20 June 2022

A covert launch on June 19? [UPDATED]

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  click map to enlarge On 19 June 2022 at 4:27 UT, SpaceX launched a Falcon 9 from Cape Canaveral pad 40 ostensibly carrying a Globalstar b...
Thursday, 16 June 2022

Some personal news: Lecturer in optical Space Situational Awareness

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I have some personal news to report.  As of June 1, I have been appointed as Lecturer in optical Space Situational Awareness at Delft Tech...