Posts by s-band

The viasat ODUs are very difficult to use as they have a complex control signal. I don't know of anyone who has managed to repurpose one. They are highly integrated whereas the Gilats have a normal LNB inside and can be used without mods, just ignore the tx part.

I've no experience of it but it looks like a good PLL band B model. I don't know how easy they are to obtain in Oz but in Europe, Gilat AN8002 outdoor units (TX/RX) are sometimes on Ebay. They have good performance and include a polariser and feed. The AN8004 is band D but less common. Try a search here and on SatsUK to see how they have been used. In UK they are often around 20-50GBP but weigh around 2kg so shipping can be expensive.

Feedhorn I didn't manage to find a cheap route to registration. If you go through the process and find one, let us know. However, the free access is useful but it's hard to work out how some satellite names translate to commonly used names. Here's a screenshot of an Asiasat wild card search limited to 122E. Click on 'Open dashboard for detail' for the frequency bands (Link it Asiasat-AAA).

Maybe the Ka bands were approved but never activated. You need more detail of the craft itself.

jaes Keep an eye on it, I have been caught out by Elektro-L 2 which has a very strong carrier on 7500 when the modulation is off. My 1.2m may have worse side lobes than your 2.2 but I see the 7500 signal in a few places far removed from 14.5W. Check if there's any correlation between the 2.

Although I missed the actual transmissions, thanks to the IQ files from Phil, M0DNY, this is what could have been seen. The captures below were generated using an arbitrary waveform generator to replay the files into the TBS6903. My off-air SNR would have been 6-8dB lower though.

This was also on the server from 2016

I messed up the TLE for the 0951 pass but here is the video from the merged feed

Colour bars were transmitted on the last pass over Europe. The ground station merger feed is here It was an overhead pass for me so in the trees all the time except for a short time when it was below threshold.

A contact is planned for 0951UTC

If you want to avoid Win 11 and keep receiving security updates, you could use the LTSC versions of W10 (Long Term Service Channel). There are a number of sellers offering multi user licences at good prices. W10 Enterprise LTSC 2019 will get updates until 2029 and W10 LTSC 2021 will get them until 2026. Some new software will not run on 2019 and neither can be used to upgrade an existing version. It's best to wipe the drive before installation. Being the Enterprise editions, they can be locked down more easily to avoid updates.

Google übersetzt: Wenn Sie Windows 11 vermeiden und weiterhin Sicherheitsupdates erhalten möchten, können Sie die LTSC-Versionen von Windows 10 (Long Term Service Channel) verwenden. Es gibt zahlreiche Anbieter, die Mehrbenutzerlizenzen zu günstigen Preisen anbieten. Windows 10 Enterprise LTSC 2019 erhält Updates bis 2029 und Windows 10 LTSC 2021 bis 2026. Einige neue Softwareprogramme sind unter Windows 10 Enterprise LTSC 2019 nicht lauffähig und können nicht zum Upgrade einer bestehenden Version verwendet werden. Am besten löschen Sie die Festplatte vor der Installation. Da es sich um Enterprise-Editionen handelt, können diese leichter gesperrt werden, um Updates zu vermeiden.

14/9/25 update

Signal level plot for 14/9/25 (not 15th as plot text). This was a 55 deg elevation max pass. The first minute was in the trees to some extent and at around 250 seconds it was behind trees again.

The plot below shows the signal environment. It was from a low angle pass so ISS was not strong. Magenta is held maximum and blue is live. There are 5G signals below ISS and WLAN above.

Here's a plot from yesterday. The position hadn't changed enough to be noticed with the 1.2m dish compared to 2nd Sept.

No signal was observed today, reason unknown.

If you don't want to cut the case, you could try Gap Pads first. Then you could add heat sinks to the case, using thermally conductive adhesive, if you need more cooling.

femi It's no longer in Earth orbit. I'm not quite sure how far it is but it's more than 10Mkm. I've added the information I used to track it this morning to the previous post. The Doppler change rate is low and it should be one of the easier things to track for a while.

Tianwen 2 is a Chinese asteroid sample return and comet exploration mission. There's no published ephemeris data but thanks to DF2MZ, the position was found to be RA = 6.56h, Dec = -01.54° this morning.

It's quite strong and the data sidebands were just visible, see the plots for more information.

The RX888 SDR gets too hot to run continuously. I think that its construction is similar to the TBS box with a sleeve over the PCB. I cut a 35mm hole with a hole saw like these and tapped a couple of fixing holes making sure that the screws didn't go in too far. Removing the end plate allows free air flow.

Found by John on SatsUK jaes

13505V

13545V

1.2m dish

Yet another X band system. This has the SMW 7.75-8.5GHz LNB mentioned here. Looking at the feed assembly from the dish end:

1.2m 0.8 f/d dish (upside down), conical feed, 28mm squashed tube polariser, Flann round to rectangular waveguide adaptor (from a broken attenuator), LNB. The blue cable is the IF out and the silver one carries DC and the 10MHz reference.

It's been a while and it was hard to find this time. It was at 868.6Mkm with -0.51Hz/sec Doppler change.

1.2m dish with repaired SMW LNB with ext. ref.

I get a worse SNR on 8.4GHz compared to that on 32 GHz, here

Still on the 1.2m dish but using the repaired SMW LNB see this

At 481.6Mkm with -0.51Hz/sec Doppler change

Update:

A 1 hour plot of TW1. Details in file name.