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Radiosonde (TTxx and IIxx) decoding

I have written two perl programs which together can be used to decode GTS radiosonde messages (TTxx, land stations; and IIxx, mobile land).

The programs

temps1.pl does the decoding phase. Output is then passed to the next phase.

stick1.pl takes the output from the decoding phase, sticks together corresponding sections (AA, BB, CC, DD) from the same station, formats and prints them.

A web interface

I have a web-based interface to these programs allowing on-line decoding of data (restriction: either you cut-and-paste the data into the window, or the data must be available on the web, either as an ftp: or http: URL).

A java interface

Even more excitingly, I have an very experimental Java interface to the decode program. Try it!.

Use

The programs are tested under unix. One says:

	temps1.pl nofileoutput=1 filename | stick1.pl | more

Other exciting options are detailed in the codes.

Sample output

Given the data file "data.gts" containg:

TTAA  66001 68994 99011 10427 34019
00117 09632 34019 92767 10429 01022 85465 06437 35034
70049 03886 35035 50568 15769 34536 40733 26763 34538
30933 42958 32544 25054 52158 31550 20194 62958 32549
15373 59799 31550 10625 61399 31546 88999 77999=

The output is:

68994.16.00
1011.0  -999.0   10.4    2.7  340   10 
1000.0   117.0    9.6    3.2  340   10 
 925.0   767.0   10.4    2.9   10   11 
 850.0  1465.0    6.4    3.7  350   18 
 700.0  3049.0    3.8   36.0  350   18 
 500.0  5680.0  -15.7   19.0  345   19 
 400.0  7330.0  -26.7   13.0  345   20 
 300.0  9330.0  -42.9    8.0  325   23 
 250.0 10540.0  -52.1    8.0  315   26 
 200.0 11940.0  -62.9    8.0  325   25 
 150.0 13730.0  -59.7   49.0  315   26 
 100.0 16250.0  -61.3   49.0  315   24

These columns are:

Pressu Geopotent Temper DewPo Wind  Wind
re hPa ialHeight ature  int   Dir   Speed

Past last modified: 12/6/2002