Gallery 2022 |
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2022-01-07 0625 - 1150 UTC (5h 25m) Samsung NX 500 & Samyang 8mm F2.8 UMC Fisheye II, interval 7 seconds, speed 210x 20220107_0625-1150utc_Kacerov_x264_1920x1080.mp4 (134 MB) 20220107_0625-1150utc_Kacerov_x265_1920x1080.mkv (136 MB, H.265) Cirrus morning. Cirrus clouds and waves in these, various halo phenomena, contrails (condensation trails) and their shadows. Visibility of several types of halo phenomena changes here significantly with varying microphysical composition of cirrus clouds passing above. As regards contrails and their shadows, only those contrails which are higher than the regular cirrus clouds cast shadows on these. Moreover, location of the contrail shadows with respect to the contrails themselves depends on their relative position to the Sun. The timelapse was captured from Praha - Kačerov, Czech Republic.
------------------------------------ I was also curious to see how well these contrails can be seen in satellite imagery, namely in the M09 band (1.38 µm) of the VIIRS instrument bands, flown on NPP and NOAA-20 satellites. The 1.38 µm band will be one of the new bands of Flexible combined Imager (FCI) on Meteosat Third Generation (MTG) satellites, first of which (MTG-I1) is to be launched by the end of this year (Dec 2022). To learn what we can expect from FCI data, other recent satellites and their instruments, which already have some of the upcoming MTG FCI new bands, are used - including VIIRS. Also, the RGB Cloud Type image product (below) utilizes the 1.38 µm band. Some examples of utilization of the 1.38 µm band can be found here or here.
www.eumetrain.org/rgb_quick_guides/ |