Astronomical Society of Coonabarabran


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Weather satellite images recorded at Coonabarabran, Australia.

Latitude: -31.270, Longitude: 149.280

Software: WXtoImg version 2.10.11

Receiver: APT-06

Antenna: Homebrew QFH

Click on any image below for a full sized image. Times are shown in AUS Eastern Daylight Time.

Next Scheduled Satellite Passes over Coonabarabran, Australia

Satellite
Name
Start of Pass Time Available Direction Maximum Elevation
Degrees (East or West)
Frequency
MHz
UTC Local Time* UTC Local Time*
NOAA 19 26 Jan 16:07 27 Jan 03:07 26 Jan 16:36 27 Jan 03:36 137.10
NOAA 19 26 Jan 17:49 27 Jan 04:49 26 Jan 18:16 27 Jan 05:16 137.10
NOAA 15 26 Jan 18:38 27 Jan 05:38 26 Jan 19:05 27 Jan 06:05 137.62
NOAA 18 26 Jan 19:52 27 Jan 06:52 26 Jan 20:45 27 Jan 07:45 137.9125
NOAA 15 26 Jan 20:17 27 Jan 07:17 26 Jan 20:57 27 Jan 07:57 137.62
NOAA 18 26 Jan 21:35 27 Jan 08:35 26 Jan 22:00 27 Jan 09:00 137.9125
NOAA 19 27 Jan 04:35 27 Jan 15:35 27 Jan 05:04 27 Jan 16:04 137.10
NOAA 19 27 Jan 06:16 27 Jan 17:16 27 Jan 06:44 27 Jan 17:44 137.10

* Local time is AUS Eastern Daylight Time.

New images are added to display after every pass at Time Available.

NOTE: When the passes of satellites overlap, only the one with the greater maximum elevation is recorded and displayed.

Explanation of the Weather Satellite images

There are 3 APT (Automatic Picture Transmission) active weather satellites, NOAA 15, NOAA 18 and NOAA 19 that send two monochrome images a pass using combinations of a visible light and three different infra-red wavelengths, depending whether day or night. These are used here to produce three coloured images.

MCIR (Multi Colour Infra Red) which uses infra-red images to colour land from light green to dark green and eventually to black due to higher temperatures, water blue, low cloud grey and high cloud white. It may be difficult to distinguish low cloud over land and water. Colours from green through red, and black to white are added to clouds, to indicate the possibility, of rain or snow, green being the least possible through to red, black, grey and white being progressively more possible.

MSA (Multi Spectral Analysis), uses infra-red images to improve detection of low cloud over land and water, but cannot be used at night as it also needs daylight images. So only MCIR images are produced at night. This is why both are displayed.

THERMAL which shows the temperature the satellite sees of the surface and cloud. The scale on the left indicates the colour code, but land surface temperatures can exceed 50 degrees in Australia. These areas will be shown in a darker redish brown colour

COMPOSITE. Each satellite makes 2 or 3 passes that can be received from any given location approximately 100 minutes apart repeated approximately every 12 hours. Multiple passes are assembled to make composite images whose components may span several hours. If another satellite passes between passes of a given one, it's images may be used, thus reducing the time span of the composite image and improving its resolution and area of coverage.

When all images of the same satellite pass are produced, they are displayed in the one frame. The wave like patterns on some images are caused by electrical interference to the received signal. Unfortunately there is an 11,000 volt electrical mains transformer close to the site of the receiving antenna.

The black cross inicates the location of the receiving station and the black dots indicate cities with a population of 100,000 or more.

Some useful links

Click here for the Australian Government's Bureau of Meteorology

Click here for Storm Tracker

Click here for status of the satellites


** The images and other information on this page are kindly provided by Kevin Cooper and their currency is subject to the availability of his equipment.

*** The images and other information on this page are dependent on information provided by other organisations and/or people. No responsibility for their accuracy and/or continued availability is taken by the Astronomical Society of Coonabarabran.

Document made with Nvu Copyright (c) 2006 - 2012 Astronomical Society of Coonabarabran Inc. All rights reserved.