Bulgarian National Institute of HydroMeteorology (BNIHM)


Instrument Information Update

Stn132 Sofia	Data for all years (1964-67, 1988-2000) originally posted on the WOUDC ftp site, have 
             	been replaced.  The original data incorrectly reported a Dobson instrument (#000) in 
           	operation instead of a Filter ozonemeter.  


The changes are as follows:


Temporal Range	Instrument	Serial Number

1964-1967	Filter M-83	Not available (na)
1988-2000-08	Filter M-124 	Not available (na)
2000-09 	Filter M-124	231

Note, two M-124 filter instruments have been used at Sofia station since 1988 (#231 and #251), but information concerning
when these instruments were in use, is not available.


- BNIHM and WOUDC (May 2003)