Sky Temperature

Sky temperature map

Shows the sky noise for the band selected.


Enter your Maidenhead locator in the "LOCATOR" field. Select band to calculate for in "EME BAND". Change the scale if needed.


Enter minimum elevation at your location to show, the part of the map that are below this elevation will be grayed out.

Delete the value in the entry field to show all of the map.


Enter antenna azimuth/elevation to define a point on the map, the data for this position will be auto updated.


You can change the time of day by pressing the "-1h" and "+1h" buttons. "Now" resets time to "now".


Move the mouse around the map to show azimuth/elevation as seen from your observation point.


Click with mouse on map and a pinned point will be shown with information below the map. Click again with mouse to remove point.


The checkbox "IMPROVED MODEL" switches between a simple scaling from 408MHz to the band selected (F^-2.8) to the model described in this PDF file.


Sun noise prediction online tool

SimpleCalc tool


400 MHz Sky Noise Map — EME
408 MHz Sky Noise Map · EME
Cursor T sky (K)
RA
Dec
RIGHT ASCENSION
Cold
Hot Sky temperature (K) at 400 MHz
Cassiopeia A
Cygnus A
Taurus A
Virgo A
Leo (M65)
Centaurus A
Sgr A*
°
°
°
Enter Az/El to track antenna pointing
Based on Haslam 408 MHz all-sky survey | Frequency scaling: T ∝ ν−2.8
RA
Dec
T sky
Noise region