The first imagery from the Chinese Satellite FY-4A has been released. The true-color composite, above, was generated from two visible and one near-infrared channel. The image below shows all 14 Bands on the satellite.

In addition to the 14-channel Advanced Geostationary Radiation Imagery (AGRI), from which the imagery above was derived, FY-4A also carries a Lightning Mapper Imager, The Geostationary Interferometric Infrared Sounder (GIIRS) and a Space Environment Package. For more information and imagery, click here or here.

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Note: GOES-16 data shown on this page are preliminary, non-operational data and are undergoing on-orbit testing.

GOES-16 Data started flowing into the National Weather Service’s AWIPS system via NOAAPORT at 1800 UTC on 2 March 2017. At present, all 16 bands from the ABI, as well as select band differences and RGB products, are available. The animation above shows the 16 bands (Click here for a faster animation) in the GOES-16 CONUS Sector displayed over the predefined AWIPS CONUS Domain. Two RGBs (Red-Green-Blue Composites) are shown below: The ‘Icing’ RGB and the Daytime Composite are shown. The Icing RGB makes use of the Snow/Ice Channel from GOES-16, at 1.61 µm, that is in a region of the electromagnetic spectrum where ice strongly absorbs radiation. Thus regions including ice appear red or violet.

The predefined AWIPS CONUS domain and the GOES-R CONUS Sector do not overlap. The toggle below shows GOES-R CONUS Sector data displayed on a Full Disk Image, along with the same image over the AWIPS CONUS domain. The southern and eastern parts of the GOES-R CONUS Domain do not show up in the pre-defined AWIPS CONUS domain. Note also that the GOES-16 CONUS Domain does not extend very far northward from the US-Canada border. Forecast Offices over the northern United States will have to rely on Full Disk imagery (at 6-km resolution in AWIPS) when looking into Canada for features slipping southward in northwest flow.

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Note: GOES-16 data shown on this page are preliminary, non-operational data and are undergoing on-orbit testing.

A strong pre-cold-frontal squall line produced widespread severe weather (primarily damaging winds: SPC storm reports) across the eastern US on 01 March 2017. A GOES-16 Mesoscale Sector provided imagery at 60-second intervals during a portion of the day — and ABI 0.5-km resolution Visible (0.64 µm) images (above; also available as a 79 Mbyte animated GIF) showed the well-defined squall line cloud band as it moved across Virginia.  Behind the squall line, note the presence of semi-stationary mountain wave rotor clouds downwind of the Appalachian Mountains. A larger-scale animation is available here.

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Note: GOES-16 data shown on this page are preliminary, non-operational data and are undergoing on-orbit testing.

The ABI Band at 0.86 µm (Fact Sheet) allows superior land/sea discrimination. This occurs because land is more reflective to radiation at 0.86 µm than to radiation at 0.64 µm. The toggle above shows Florida in the standard visible (0.64 µm) and at 0.86 µm. Coastal boundaries and islands (such as the Keys and the Bahamas) are far more distinct in the near-infrared so-called ‘veggie’ channel at 0.86 µm. Inland lakes are also better defined with the 0.86 µm channel. Because the land is so bright, land/cloud contrast is reduced in the 0.86 µm imagery, so clouds over land appear more distinct in the 0.64 µm imagery.

The toggle below shows a similar scene over the Tidewater region of southeast Virginia and points to the south.  Again, inland lakes and rivers and the coastal boundary is more apparent in the 0.86 µm imagery than in the 0.64 µm imagery.

Use the 0.86 µm band when land/water distinction is important!

Because ABI does not have a spectral band in the ‘green’ part of the electromagnetic spectrum (Band 1 at 0.47 µm is in the blue, Band 2 at 0.64 µm is in the red), information from the 0.86 µm band is used in construction of simulated ‘true color’ imagery (as discussed here).

In addition, the 0.86 µm channel provides useful burn scar information in ‘False Color’ imagery (that combines 2.2 µm, 0.86 µm and 0.64 µm imagery) because burn scars appear dark in 0.86 µm imagery.

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