Sven Grahn

I rymdbranschen sedan 1962. Arbetade heltid på Rymdbolaget 1975-2006. Bolagets tekniske direktör vid pensioneringen. Hopelessly romantic about spaceflight.

[Sven Grahn @svempa46]

I ran the Luna-3 NASA GMAT orbit simulation for 330 days. In the sim the spacecraft hit the Earth on 24 May 1960.

[Sven Grahn @svempa46]

@coastal8049 Have you tried 8482.75 MHz? Way beyond my capability, but that is supposed to the fx.

[Sven Grahn @svempa46]

@SSCSpaceSverige Inuti en radom fanns en styrbar gruppantenn av ”vändkorselement för det s.k. P-bandet (215-260 MHz) som användes för telemetri från sondraketer.

[Sven Grahn @svempa46]

Apollo 17 I saw it go https://t.co/Tqw5cgCdXf via @YouTube

[Sven Grahn @svempa46]

Apollo 17 I saw it go https://t.co/Tqw5cgCdXf via @YouTube

[Sven Grahn @svempa46]

@cgbassa @R4UAB It did, but it has gone silent, I think. Have not checked very often.

[Sven Grahn @svempa46]

The Nauka docking was below my horizon, so I could not monitor TORU 😞 I checked the Zvezda and Nauka transmitters all running at 1623.16-1630.10 UT. I will “drop track” and put the old UHF-TV antenna on the shelf in the barn where it was 20 years waiting for a chance to be used!

[Sven Grahn @svempa46]

@planet4589 Also irritates me.

[Sven Grahn @svempa46]

@RussianSpaceWeb Well, if TORU is just turned on to override any dangerous automatic commands, if they occur, and nothing needs to be done, then it is a fully automatic docking. I am not sure how TORU works, what can it do? But why the comment from someone “this was not an easy docking”?

[Sven Grahn @svempa46]

Nauka on 631 MHz tonight (27 July): 1820.04-1823.29 UT. Command-on. The maneuver four hours earlier probably not big enough to be noticeable so soon after.

[Sven Grahn @svempa46]

Nauka command-on at 1746.40 UT (approx) an fadeout at 1750.40 UT. I have lots of trees to the SE and they attenuate the signal a bit. On 631.0 MHz as usual. On time relative to element set. My location: Eskilstuna, Sweden.

[Sven Grahn @svempa46]

@planet4589 Did some quickie computations. On day 207.2 (this morning) the RA of the orbital planes were:
ISS=149.74 degrees, Nauka=150.10 degrees. Nauka is closing the gap at a rate of 0.12 degrees per day. Looks reasonable...if you have the time check the TLEs. It is so easy to mess up.

[Sven Grahn @svempa46]

Did some quickie computations. On day 207.2 (this morning) the Right Ascensions of the orbital planes were as follows:
ISS=149.74 degrees, Nauka=150.10 degrees. Nauka is closing the gap at a rate of 0.12 degrees per day. Looks reasonable...if you have the time check the TLEs.

[Sven Grahn @svempa46]

@RussianSpaceWeb Did some quickie computations. On day 207.2 (this morning) the Right Ascensions of the orbital planes were as follows:
ISS=149.74 degrees, Nauka=150.10 degrees. Nauka is closing the gap at a rate of 0.12 degrees per day. Looks reasonable...if you have the time check the TLEs.

[Sven Grahn @svempa46]

Nauka received spot on times predicted by the just published element set: 1713.40-1718.00 UT, July 25, 2021. On 631 MHz.

[Sven Grahn @svempa46]

NAUKA element set now published by Space Forces. Orbit is 334-406 km. Period is 91.9 minutes, pretty close to my guess from last night's radio observations of 92.0 min.

[Sven Grahn @svempa46]

@planet4589 @18SPCS TLE for rev 60 now up.. Heights 334-406 km

[Sven Grahn @svempa46]

@planet4589 @18SPCS In three hours or so I can check with radio tracking if that is indeed the orbit (very approximately).

[Sven Grahn @svempa46]

https://t.co/458KgoxRLZ says Nauka orbit is now 340-420 km.