Date
1 - 10 of 10
SOME progress
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Robert Moore
Ernst (and others) last night I acquired Metop-C imagery, so maybe we have solved the dish-pointing issue - or are close to a resolution. Fingers still crossed.
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Robert -----Original Message-----
From: MSG-1@groups.io <MSG-1@groups.io> On Behalf Of David J Taylor GM8ARV ?????????????? ???? via groups.io Sent: 18 July 2022 14:30 To: MSG-1@groups.io Subject: Re: [MSG-1] not much more progress On 18/07/2022 12:13, geojohnt via groups.io wrote: Ernst,SNR can depend on the bandwidth in which the signal is measured, not sure what the white dotted lines are supposed to represent - perhaps the nominal channel. I've attached a 200 MHz scan taken very early this morning showing both polarisations and both TP1 and TP2 frequencies. This does seem to be broadly in agreement with the meter shown. Ignore the dB numeric figures. Of course, one key adjustment is skew on the LNB. A good installer should have done that, though. You'll see that - at least on my system - the unwanted vertically polarised signal is stronger than the horizontally polarised wanted one. Of course, the beam from the dish (thinking about it as a transmitter) will not be just a constant size cylinder all the way to the satellite. It will have spreading and side-lobes and hence will see some of the ambient temperature tree and leaves which generate much more noise than the cold of space. Optimum LNB focus adjustment may help to minimise this. I played with Paint Shop Pro 10 a little, but I don't think it improves the image legibility. Cheers, David -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email: david-taylor@... Twitter: @gm8arv |
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On 20/07/2022 09:53, Robert Moore wrote:
Ernst (and others) last night I acquired Metop-C imagery, so maybe we have solved the dish-pointing issue - or are close to a resolution. Fingers still crossed.Robert, I remain puzzled by your statement. Thinking out loud... If you can receive the Basic Service you should be able to receive any data on that service equally well. Now I know that some files are bigger than others, so the chance of then being interrupted are greater, so in that context your statement makes sense. But you should be able to receive Metop-B equally well. Is that not the case? I've not done the sums, but with more files making up Zero degree and IODC data there may be more chance of the complete image missing some segments, but this may be hidden as the managers write the final image a segment at a time, so an older segment may be left and not over written by newer, but interrupted, data. So are you getting zero-degree and IODC data? Rapid-scan is off right now until Thursday morning. Complications are that the channel names were changed after March 22, so if you haven't yet made those changes you'll need to do so. Further, more recently, the satellite for IODC has changed from MSG-1 to MSG-2, requiring a simple change in the MSG Data Manager handling IODC, and new software versions of the MSG Data Manager, GeoSatSignal and MSG Animator. Maybe this also explains your statement! Cheers, David -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email: david-taylor@... Twitter: @gm8arv |
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Robert Moore
Thanks David, I'm not trying to do too much at once; one channel at a time. Yes, I now have Metop-B. IODC later today. Busy with grandchildren!
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Robert -----Original Message-----
From: MSG-1@groups.io <MSG-1@groups.io> On Behalf Of David J Taylor GM8ARV ?????????????? ???? via groups.io Sent: 20 July 2022 10:20 To: MSG-1@groups.io Subject: Re: [MSG-1] SOME progress On 20/07/2022 09:53, Robert Moore wrote: Ernst (and others) last night I acquired Metop-C imagery, so maybe we have solved the dish-pointing issue - or are close to a resolution. Fingers still crossed.Robert, I remain puzzled by your statement. Thinking out loud... If you can receive the Basic Service you should be able to receive any data on that service equally well. Now I know that some files are bigger than others, so the chance of then being interrupted are greater, so in that context your statement makes sense. But you should be able to receive Metop-B equally well. Is that not the case? I've not done the sums, but with more files making up Zero degree and IODC data there may be more chance of the complete image missing some segments, but this may be hidden as the managers write the final image a segment at a time, so an older segment may be left and not over written by newer, but interrupted, data. So are you getting zero-degree and IODC data? Rapid-scan is off right now until Thursday morning. Complications are that the channel names were changed after March 22, so if you haven't yet made those changes you'll need to do so. Further, more recently, the satellite for IODC has changed from MSG-1 to MSG-2, requiring a simple change in the MSG Data Manager handling IODC, and new software versions of the MSG Data Manager, GeoSatSignal and MSG Animator. Maybe this also explains your statement! Cheers, David -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email: david-taylor@... Twitter: @gm8arv |
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On 20/07/2022 11:58, Robert Moore wrote:
Thanks David, I'm not trying to do too much at once; one channel at a time. Yes, I now have Metop-B. IODC later today. Busy with grandchildren!Excellent! I wish I could discipline myself to have more patience! Cheers, David -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email: david-taylor@... Twitter: @gm8arv |
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Robert Moore
Aha! I have MSG-2 files building up in my IODC folder on the receiver PC but MDM did not recognise them. So, this is why I need a new version of the latter. The tweaks you mentioned, David, are presumably in emails? I'll download and have another go but may need to be pointed to earlier emails later.
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Robert -----Original Message-----
From: MSG-1@groups.io <MSG-1@groups.io> On Behalf Of David J Taylor GM8ARV ?????????????? ???? via groups.io Sent: 20 July 2022 14:23 To: MSG-1@groups.io Subject: Re: [MSG-1] SOME progress On 20/07/2022 11:58, Robert Moore wrote: Thanks David, I'm not trying to do too much at once; one channel at a time. Yes, I now have Metop-B. IODC later today. Busy with grandchildren!Excellent! I wish I could discipline myself to have more patience! Cheers, David -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email: david-taylor@... Twitter: @gm8arv |
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On 20/07/2022 20:28, Robert Moore wrote:
Aha! I have MSG-2 files building up in my IODC folder on the receiver PC but MDM did not recognise them. So, this is why I need a new version of the latter. The tweaks you mentioned, David, are presumably in emails? I'll download and have another go but may need to be pointed to earlier emails later.Great! No need for a new version, just set your IODC MSG Data Manager to look for MSG2 instead of MSG1. It's in the Setup, Advanced, and requires a program restart. Cheers, David -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email: david-taylor@... Twitter: @gm8arv |
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Robert Moore
Metop-C has now settled down after a very erratic start. But Metop-B is not working properly, it has been repeating the same circuit of Earth all day. The orbit covers North Island of NZ and Kamchatcha peninsular, over the top and down towards the south pole via central Europe and clipping the east coast of Brazil, Antarctica and back to NZ. Not very useful.
Robert |
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On 23/07/2022 15:41, Robert Moore wrote:
Metop-C has now settled down after a very erratic start. But Metop-B is not working properly, it has been repeating the same circuit of Earth all day. The orbit covers North Island of NZ and Kamchatcha peninsular, over the top and down towards the south pole via central Europe and clipping the east coast of Brazil, Antarctica and back to NZ. Not very useful.Robert, That sounds like one bad file. Look for the last file processed (or attempted) in the log and delete that file from the received directory. Cheers, David -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email: david-taylor@... Twitter: @gm8arv |
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Robert Moore
Thanks David, without any intervention on my part Metop-B started working properly. It had been in its loop all day yesterday and all this morning.
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Robert -----Original Message-----
From: MSG-1@groups.io <MSG-1@groups.io> On Behalf Of David J Taylor GM8ARV ?????????????? ???? via groups.io Sent: 23 July 2022 19:10 To: MSG-1@groups.io Subject: Re: [MSG-1] SOME progress On 23/07/2022 15:41, Robert Moore wrote: Metop-C has now settled down after a very erratic start. But Metop-B is not working properly, it has been repeating the same circuit of Earth all day. The orbit covers North Island of NZ and Kamchatcha peninsular, over the top and down towards the south pole via central Europe and clipping the east coast of Brazil, Antarctica and back to NZ. Not very useful.Robert, That sounds like one bad file. Look for the last file processed (or attempted) in the log and delete that file from the received directory. Cheers, David -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email: david-taylor@... Twitter: @gm8arv |
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Robert Moore
Some quite strong winds with irregular gusts do not seem to have disrupted reception today. But we have yet to see what happens when my ultra-exposed dish gets the full fury of a winter gale. Thought I might try HVS-1 with my ridiculously low SNR - just to try my luck. Couldn't find anything on EUMETSAT website about altering the *ini files, only some additions. So, can I assume 'no change'?
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Robert -----Original Message-----
From: MSG-1@groups.io <MSG-1@groups.io> On Behalf Of David J Taylor GM8ARV ?????????????? ???? via groups.io Sent: 20 July 2022 10:20 To: MSG-1@groups.io Subject: Re: [MSG-1] SOME progress On 20/07/2022 09:53, Robert Moore wrote: Ernst (and others) last night I acquired Metop-C imagery, so maybe we have solved the dish-pointing issue - or are close to a resolution. Fingers still crossed.Robert, I remain puzzled by your statement. Thinking out loud... If you can receive the Basic Service you should be able to receive any data on that service equally well. Now I know that some files are bigger than others, so the chance of then being interrupted are greater, so in that context your statement makes sense. But you should be able to receive Metop-B equally well. Is that not the case? I've not done the sums, but with more files making up Zero degree and IODC data there may be more chance of the complete image missing some segments, but this may be hidden as the managers write the final image a segment at a time, so an older segment may be left and not over written by newer, but interrupted, data. So are you getting zero-degree and IODC data? Rapid-scan is off right now until Thursday morning. Complications are that the channel names were changed after March 22, so if you haven't yet made those changes you'll need to do so. Further, more recently, the satellite for IODC has changed from MSG-1 to MSG-2, requiring a simple change in the MSG Data Manager handling IODC, and new software versions of the MSG Data Manager, GeoSatSignal and MSG Animator. Maybe this also explains your statement! Cheers, David -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email: david-taylor@... Twitter: @gm8arv |
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