MAWS HydroMet™ Systems for Meteorological and Hydrological ...

Technical Description ________________________________________________________________
Data Compression
The cost of telecommunications is often the most significant annual
cost in operating the network. In order to lower this cost the MAWS
system offers two automatic data compression methods which are user
configurable. This function is particularly useful when the data is
transferred using methods which are costly or otherwise limit the
amount of data to be transferred. Such methods include, for example,
satellite systems and SMS (Short Message Service) messages in
cellular data transfer.
There are two methods for automatic report formatting: BASE32 and
BCD. Depending on the parameters and the length of the message, the
data reduction can even be over 50 %.
An Example of the Compression Setup Window
Base32 Compression
The BASE32 report formatting method produces ASCII data and thus
printable characters. With this method every measured value is scaled
and converted using a radix of 32 instead of 1. The compression ratio
is approximately from 30 to 60 %.
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