NOAA APT weather satellite images recorded by VA3ROM at Thunder Bay, Canada

Coordinates (latitude, longitude): 48.450, -89.200 (Grid: EN58jk)
Receiver: RTL-SDR USB dongle + SDR# + Calico CAT Kenwood receiver emulator plugin
Antenna : Homemade turnstile + LNA + SAW filter

APT     APT Satellite Operational Status     Group for Earth Observation

Note: NOAA-19 can be interfered with by METEOR-M2 because they share the same frequency with orbits that overlap at intervals plus local electrical noise (AC powered LED lighting, furnaces, Wi-Fi routers, VHF pagers, et al) causes major interferrence and reception problems. The analog APT "birds" were intended for only five year missions (NOAA-15 has been brought back to "life" several times by brilliant flight engineers) but they just kept "chugging" along year after year after year. NOAA predicted that only one would be operating by the mid 2020's so three new digital LRIT Russian METEOR birds were sent up as replacements except no one "told" NOAA-15, 18 and 19! They refuse to "die" and are still working 24/7 while two of three METEORs have failed!

Pristine: The best representation of the original received satellite data. Pristine images are unenhanced and used as the source to create all processed images by combining the various sensor telemetry contained within them with colour lookup tables (CLUTs).

Map Coloured Infrared (MCIR) with Precip: Uses sensor 4 (thermal infrared) of pristine image creating a false colour image using a CLUT showing areas of cloud coverage, layer opacities with precipitation estimates ranging in colours from light (green), moderate (yellow), strong(red), intense (grey) to extreme (black). Available for both local daylight and night passes.

Multi-Spectral Analysis (MSA) with Precip: Uses sensors 1 or 2 (visible light or near infrared) and sensor 4 of pristine image creating a near true colour near visible light image with precipitation estimates ranging in colours from light (green), moderate (yellow), strong(red), intense (grey) to extreme (black). Available only for local daylight passes when solar elevation > 15 degrees.

MSA anaglyph (false 3D image): Uses sensors 2 and 4 of pristine image and determines which regions are most likely cloud, land or sea based on an analysis of the two images creating a stereoscopic photograph (anaglyph) producing a false three-dimensional image when viewed through red/blue 3D glasses. Available only for local daylight passes when solar elevation > 15 degrees.

Sea Surface Temperature (SST): Uses sensors 3 (mid infrared) and 4 of pristine image creating a false colour image using a CLUT. Normally, only cloud tops are imaged, but if no clouds are in the way then water surfaces are imaged. Available for both local daylight and night passes.

Thermal: Uses sensors 3 and 4 of pristine image creating a false colour image using a CLUT. Normally, only cloud tops are imaged but if no clouds are in the way then land and water surfaces are imaged. Available for both local daylight and night passes.

Click satellite image for full size view. Local dates and times are for the Canadian Eastern Time Zone