TEMP (upper air soundings) is a set of
World Meteorological Organization (WMO) alphanumerical codes used for reporting weather observations of the upper regions of the
atmosphere
An atmosphere () is a layer of gases that envelop an astronomical object, held in place by the gravity of the object. A planet retains an atmosphere when the gravity is great and the temperature of the atmosphere is low. A stellar atmosph ...
made by
weather balloon
A weather balloon, also known as a sounding balloon, is a balloon (specifically a type of high-altitude balloon) that carries instruments to the stratosphere to send back information on atmospheric pressure, temperature, humidity and wind spe ...
s released from the surface level (either at land or at sea). The WMO designates the FM-35 numerical code for surface TEMPs and the FM-36 numerical code for ship-based TEMPs.
In the next link, you can find the format (Manual on Codes) page 85
https://library.wmo.int/doc_num.php?explnum_id=10235
Earth sciences data formats
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