HRIT and LRIT Low-Cost System

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K3HTK
Posts: 1
Joined: Mon Mar 04, 2019 2:51 am

Re: HRIT and LRIT Low-Cost System

Postby K3HTK » Mon Mar 04, 2019 2:54 am

I have been trying to utilize the contact form on the USA-Satcom web page to figure out how to get this software. The contact page is not working. Is there another means to get a hold of him for this, or an email address someone has? Interested in using my SDRPlay RSP2 to get in the game! Looks very promising...

Thanks,
Ed
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usa_satcom
Posts: 1
Joined: Mon Mar 04, 2019 9:06 pm

Re: HRIT and LRIT Low-Cost System

Postby usa_satcom » Mon Mar 04, 2019 9:18 pm

Sorry the website contact form is not working. You can reach me (usa-satcom) using the email address in this PNG attachment.
Attachments
email.png
email.png (1.3 KiB) Viewed 2464 times
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Jaapyse
Posts: 1
Joined: Tue Apr 23, 2019 1:15 pm

Re: HRIT and LRIT Low-Cost System

Postby Jaapyse » Tue Apr 23, 2019 1:21 pm

Hi RSP2user,
Amazing project! I am currently working on getting it set up for me as well. I'm going to try receiving Meteosat-11, it's closer to me. This is the European/African equivalent and uses the same frequency.
What kind of tripod did you use? All of the ones I can find don't allow for a skew angle. Is it just a camera tripod? How did you attach the antenna to it? I'd love to see how you solved this.
- Jaapyse
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RSP2user
Posts: 98
Joined: Mon Oct 09, 2017 7:11 am

Re: HRIT and LRIT Low-Cost System

Postby RSP2user » Wed Apr 24, 2019 10:53 pm

Jaapyse,

The tripod was an old, inexpensive camera tripod that was stored in the garage. If you search the Internet for "camera tripod low cost" you will find similar tripods. The Premiertech ANT-GRID-24DBI comes with mounting hardware that will allow for adjustment of elevation and azimuth as well as 8 angles of skew when attached to a vertical post. The top of the old tripod was broken off, but provided a vertical mounting post, so the hardware that came with the antenna was just used to mount it to the vertical post of the tripod. No spectacularly challenging engineering feats were applied to mount the antenna to the tripod. The skew angle and direction to position the antenna were determined from https://www.dishpointer.com/ . Once the antenna was close to where it needed to be pointed and applying the appropriate skew angle, the next step was to attach the LNA/filter and use SDRuno to view the 1.6941 GHz signal and approximate the SNR (to get an idea if the signal could be adequately received) and further home in on the actual satellite position. The next step was to install and set up the image decoding software: either compile it from Github or obtain it from USA-Satcom (XRIT software) and receive GOES 16 satellite images from the continental U.S. Once the decoding software was installed, the signal quality, EbNo, and Viterbi numbers provided by the software could be applied to fine tune the antenna position and any other antenna attributes (e.g., tuning and reflector adjustments) and skew to ensure optimum reception performance. For use of the XRIT software with other satellites, contact USA-Satcom. If using the ANT-GRID-24DBI antenna, take note of the modifications described in this set of posts to have it work reasonably well at 1.6941GHz.

Let us know how your efforts work out.

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RSP2user
Posts: 98
Joined: Mon Oct 09, 2017 7:11 am

Re: HRIT and LRIT Low-Cost System

Postby RSP2user » Wed Apr 24, 2019 11:16 pm

Jaapyse,

If you are located in Africa, a 1m grid parabolic antenna such as the ANT-GRID-24DBI may work for Meteosat 11 signal reception. If you are in Europe (particularly Northern European locations), you will likely need a larger parabolic antenna. If there are others in your area receiving the Meteosat signal successfully, get an idea from them what size parabolic antenna will work well. Also, note that a number of European operated geostationary weather satellites require additional decryption software from Eumetsat and a subscription so you should check local requirements, legal and otherwise for receiving such signals.

If you have an interest in weather satellite image reception and find that receiving the geostationary satellite images will be a problem, many of the same components (e.g., LNA/filter, RSP, antenna) can be used for reception of orbital HRPT satellite images. Refer to the post here: viewtopic.php?f=5&t=2624 .

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