Search found 11 matches

by Learjet
Thu Mar 05, 2020 12:12 am
Forum: User Projects
Topic: Full disc weather satellite images from GK-2A
Replies: 12
Views: 11713

Re: Full disc weather satellite images from GK-2A

Hi Daniel. If you are in Argentina you will be able to receive GOES 16 and 17 geostationary weather sats. I don't have direct experience with these as they are below my horizon. You will need a different antenna. Most people are using 1 metre grid antennas, Nooelec GOES Sawbird filters and an SDR th...
by Learjet
Mon Jan 20, 2020 3:57 am
Forum: User Projects
Topic: Full disc weather satellite images from GK-2A
Replies: 12
Views: 11713

Re: Full disc weather satellite images from GK-2A

rtlsdrblog wrote:
Fri Jan 10, 2020 3:08 am
Very nice. I'll add that for GK-2A is seems that even a smallish 400x600mm grid antenna (with LNA) is enough to decode the signal.
Yes, many are using those small grid pack antennas. I have a long coax run so much signal gets lost in it's travel to the house.
by Learjet
Mon Jan 20, 2020 3:55 am
Forum: User Projects
Topic: Full disc weather satellite images from GK-2A
Replies: 12
Views: 11713

Re: Full disc weather satellite images from GK-2A

JEL wrote:
Wed Jan 08, 2020 11:42 am
There is just one word: COOL! :)

So a tin-can, a short string of copper, and a sat-dish... is basically all that is required?
And software, of course. I use the software from USA-Satcom but it's payware. Free software is available for Linux.
by Learjet
Sun Dec 08, 2019 4:07 am
Forum: User Projects
Topic: Full disc weather satellite images from GK-2A
Replies: 12
Views: 11713

Re: Full disc weather satellite images from GK-2A

Thought I'd try an old astronomy imaging trick, where chrominance is used as an overlay to a B+W image to produce a colour image. So I found a nice map of the Earth and overlayed the colour information only. The result is a nice psuedo colour image, much like colour maps are used in Wxtoimg for NOAA...
by Learjet
Sun Dec 08, 2019 4:05 am
Forum: User Projects
Topic: Full disc weather satellite images from GK-2A
Replies: 12
Views: 11713

Re: Full disc weather satellite images from GK-2A

I used an overlay map from the GK-2A internet server and overlayed it in Photoshop for country boundries
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Some stunning images of super typhoon Hagibis from GK-2A, even if it's only a single channel LRIT. This super typhoon is equivalent to a category 5 cyclone.
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by Learjet
Sun Dec 08, 2019 4:01 am
Forum: User Projects
Topic: Full disc weather satellite images from GK-2A
Replies: 12
Views: 11713

Re: Full disc weather satellite images from GK-2A

I purchased Xrit decoder from USA-Satcom for a very good price, but if you're good with Linux, Sam makes great software for GK-2A for free!
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An image comes down every 10 minutes around the clock.
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010.jpg (152.92 KiB) Viewed 6881 times
by Learjet
Sun Dec 08, 2019 3:57 am
Forum: User Projects
Topic: Full disc weather satellite images from GK-2A
Replies: 12
Views: 11713

Re: Full disc weather satellite images from GK-2A

Next to a C band feed. 006.jpg I bought a Nooelec SDR as this one has extended range to over 2 gHz, the cheap ebay ones are crap and don't make it to 1692 mHz. I also bought a Nooelec Sawbird filter that has a 2 stage LNA and 80 mHz band pass filter. This gives 30dB. However I have also used 2 ebay ...
by Learjet
Sun Dec 08, 2019 3:55 am
Forum: User Projects
Topic: Full disc weather satellite images from GK-2A
Replies: 12
Views: 11713

Re: Full disc weather satellite images from GK-2A

I mounted this inside a can pan to make a kind of choke ring. Stuffed if I know what the illumination pattern is, but it looks good!
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by Learjet
Sun Dec 08, 2019 3:52 am
Forum: User Projects
Topic: Full disc weather satellite images from GK-2A
Replies: 12
Views: 11713

Full disc weather satellite images from GK-2A

In July of this year, Korea replaced it's ageing Coms-1 geostationary weather satellite with a brand new one called Geokompsat 2A or GK-2A for short. This satellite can be received directly on L band. The easiest transponder is the LRIT one on 1692.140 mHz. At first they carried a few different chan...
by Learjet
Tue Mar 19, 2019 1:18 pm
Forum: RTL-SDR Discussion
Topic: USA-Satcom contact
Replies: 4
Views: 2926

Re: USA-Satcom contact

What if we don't have a twitter account?