{"id":2150,"date":"2019-11-03T08:00:13","date_gmt":"2019-11-03T06:00:13","guid":{"rendered":"http:\/\/racov.ro\/?p=2150"},"modified":"2020-03-31T13:56:03","modified_gmt":"2020-03-31T10:56:03","slug":"receptie-si-decodare-satelit-meteor-m2-si-m2_2","status":"publish","type":"post","link":"https:\/\/racov.ro\/index.php\/2019\/11\/03\/receptie-si-decodare-satelit-meteor-m2-si-m2_2\/","title":{"rendered":"METEOR-M2 (and M2_2) Satellite Reception and Decoding"},"content":{"rendered":"

METEOR-M2 (and M2_2) are two Russian satellites, which send images of earth from space, like <\/span>the Americans <\/span>NOAA-15, 18 and 19 .<\/span>
\nHere<\/a><\/span><\/span> is all the interesting information about what he knows how to do.<\/span><\/p>\n

NORAD ID: 40069<\/span>
\nPerigee: 826.8 km<\/span>
\nApogee: 833.7 km<\/span>
\nInclination: 98.5 \u00b0<\/span>
\nPeriod: 101.4 minutes<\/span>
\nSemi major axis: 7201 km<\/span>
\nLaunch date: July 8, 2014<\/span>
\nLaunch site: TYURATAM MISSILE AND SPACE COMPLEX (TTMTR)<\/span>
\nDownlink (MHz): 137,100 (M2) \/ 137,900 (M2_2)<\/span>
\nMode: 72Kbps QPSK (M2) \/ OQPSK (M2_2)<\/span><\/p>\n

METEOR-M2 was designed to monitor global weather, ozone layer, ocean surface temperature and ice status, to facilitate transport in polar regions and to monitor radiation levels near Earth. The satellite was designed to operate in orbit for five years.<\/span><\/p>\n

Its decoding is more complicated than for NOAA (15, 18, 19). The latter is simple. Put the receiver on WideFM, set the frequency, feed the <\/span>Software with <\/span>audio signal (analog) and here’s the image.<\/span>
\nMeteor-M2 doesn’t work like that. First of all, the signal has 100KHz band, QPSK encoding and there is no audio. It’s like listening to the HDMI signal from the monitor. Only noise is heard. Unlike NOAA, the signal is digital and not so strong. The (free) software developed by talented guys is not as fancy as WxtoImg. Apart from the fact that it makes an incredible decoding, it does not put Lat \/ Long lines and state borders, it does not know how to make composite images (from several passes). In order to obtain an intelligible image another software must be used, which corrects the optical effect of the satellite cameras and renders the colors in a <\/span>spectrum <\/span>more pleasing to the eye.<\/span><\/p>\n

But the resolution is amazing. NOAA has 4Km \/ pixel. Meteor-M2 is 12 times<\/strong> larger – 330m \/ pixel.
\n<\/span>An EXCELLENT tutorial can be found here<\/a><\/span><\/span>. It is necessary to follow everything with patience and attention, not in a hurry. I had to do it twice until it came out right \ud83d\ude00 .<\/span><\/p>\n