Es HailSat 2 location

Latest News and Discussion about the use of the DATV transponder on Es'hail-2
g8gtz
Posts: 1120
Joined: Wed Apr 07, 2010 6:26 pm

Re: Es HailSat 2 location

Post by g8gtz » Mon Oct 08, 2018 12:27 pm

During this week, as with every equinox, the sun passes through the same position in the sky as a given satellite – using this website https://www.satellite-calculations.com/ ... erence.php you can calculate when the sun will be in the same position as BADR4 for your location.

So long as it is sunny this week (Tuesday and Wednesday look excellent), you will be able to see where to place your dish by seeing where there is direct sunlight - suggest you take some pictures so you can put the dish up later.

These are the times and dates for IO91KF (times are in Local BST)

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This, along with a lot of other information on Es'hail-2, will be in CQ-TV due out this week.

Noel - G8GTZ

g0mjw
Posts: 792
Joined: Sat Sep 20, 2014 9:15 am

Re: Es HailSat 2 location

Post by g0mjw » Mon Oct 08, 2018 3:48 pm

Thanks - that will ensure cloudy skies for the next week.

g8gtz
Posts: 1120
Joined: Wed Apr 07, 2010 6:26 pm

Re: Es HailSat 2 location

Post by g8gtz » Mon Oct 08, 2018 4:33 pm

You mean this week - and the forecast for Tuesday / Wednesday is good :-)

g0mjw
Posts: 792
Joined: Sat Sep 20, 2014 9:15 am

Re: Es HailSat 2 location

Post by g0mjw » Mon Oct 08, 2018 5:07 pm

g8gtz wrote:
Mon Oct 08, 2018 4:33 pm
You mean this week - and the forecast for Tuesday / Wednesday is good :-)
English is ambiguous - this is why we use French in international treaties. I meant the next week as in the next 7 days, not the next week following this week. Weak use of week I admit.

Mike

gi7ugv
Posts: 31
Joined: Tue Oct 31, 2017 2:47 pm

Re: Es HailSat 2 location

Post by gi7ugv » Tue Nov 20, 2018 10:14 pm

Spent some time today outside with a 90cm dish and the modified LNB with 27MHz in trying to see if I could receive BADR 4 from here.

Used the signal mentioned at about 1450MHz to peak with the SDR then used the tuner on 2246MHz with the LNB twisted 90 degrees. I would not have had much luck without those tips so thanks!

Didn't have much luck in the spot I had hoped to use. There are some overhanging branches I assumed wouldn't cause a problem but I guess they are an issue because it works fine with the dish 3m away clear of the overhang.

Image

g0mjw
Posts: 792
Joined: Sat Sep 20, 2014 9:15 am

Re: Es HailSat 2 location

Post by g0mjw » Wed Nov 21, 2018 7:40 am

That's good. I had about the same, a bit better perhaps with a 1.2m dish. With my as yet un-optimised 2.4m dish I get 12 dB MER. There are trees just about in the way. Graham, who owns a chainsaw, gets 13dB with a 1.8m dish. Given the 1.8m dish has 6dB more gain and half the beamwidth you have a good result. The main issue is more likely to be interference from adjacent high power signals from 28E rather than signal strength. Your -10dB beamwidth should be about 3.5 degrees and 2.2 degrees away there will be significant rejection, but the signals from 2 degrees away are stronger. In Northern Ireland the numbers will be different to Oxfordshire.

26E Badr ~46dBW EIRP,
28.2E Astra 54 dBW EIRP (2.2 degrees away)
23.5E Astra 3B 51 dBW (2.5 degrees away

A 60cm dish will only have 10dB rejection to these adjacent satellites so interference will be severe and it might be difficult to pick out. However, it depends on how the transponders on the adjacent satellites are configured and if there is any additional cross-polarisation rejection.

Perhaps someone with the time can do an analysis?

At 10.5GHz, there are no adjacent signals (yet) so hopefully smaller dishes will be fine.

Mike

gi7ugv
Posts: 31
Joined: Tue Oct 31, 2017 2:47 pm

Re: Es HailSat 2 location

Post by gi7ugv » Wed Nov 21, 2018 4:29 pm

It was down a bit today to 6/7 but then it's wet out. I tried returning it to the original location but no joy, nearly there but no picture even after removing one of the branches that was clearly a danger to anyone over 7ft tall. And just to confirm the larger branch above it is having some impact, I tied a rope around it and pulled at it while looking at the signal from the SDR on the screen and it did change in time with the pulls, anyone watching me doing this would likely think I'm crazy :)

It is difficult with the close by signals as you say, a small movement results in the wanted signal being swamped by the stronger Astra signals despite the dish being more on BADR 4 than them.

Now to get a larger dish mounted on the wall in the better spot and wait for something to receive on a quieter bit of spectrum!

G4EWJ
Posts: 709
Joined: Wed Feb 17, 2010 10:11 am

Re: Es HailSat 2 location

Post by G4EWJ » Wed Nov 21, 2018 4:56 pm

Looking at the Lyngsat listings for 28.2E, the nearest horizontal transponders to 11996 are 11954, 11992 and 12032. The receiver does register signal strength on 11996, but no transport stream to scan, so there could be a carrier there.

My old HP analyser only goes to 1300MHz, so I can't look at the 12GHz region more closely.

Brian

g0mjw
Posts: 792
Joined: Sat Sep 20, 2014 9:15 am

Re: Es HailSat 2 location

Post by g0mjw » Wed Nov 21, 2018 5:03 pm

I have not done it yet but I could put my analyser on the IF and see what I find. I am receiving up at 2.4 GHz as I don't have a 22kHz tone. I suppose I could fix this too, but why.
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Mike
Last edited by g0mjw on Sun Nov 25, 2018 6:26 pm, edited 2 times in total.

g4eml
Posts: 26
Joined: Thu Apr 26, 2018 9:36 am

Re: Es HailSat 2 location

Post by g4eml » Wed Nov 21, 2018 8:21 pm

BADR5 has unmodulated beacons on 11699.0 H and 11699.2 V. Fairly easy to see as a steady carrier on an SDR connected to the LNB output. I can see them on a 0.6m dish and octagon LNB.

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