Vaisala IRIS, User Manual

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SPAN nn
The time span in decimal minutes for all of the data reported in this file. This keyword
appears once at the beginning of the file. IRIS supports 60 minute spans.
CODE nnnnnn
Station code for a rain gage. The code is an arbitrary string 15 or less characters long.
This field must be present for each reported gage.
LONLAT nn.nnnnn nn.nnnnn
Longitude and latitude of a rain gage. Longitude is a real number from -180 ... +180,
with positive values representing East longitude.
Latitude is a real number from -90 ... +90, with positive values representing North
latitude. Any number of decimal digits of precision can be used. This field must be
present for each reported gage.
RRATE nn.nnn
The rain rate in millimeters/hour for a raingage. Either the RRATE field or the RFALL
field must be present for each reported gage.
RFALL nn.nnn
The rain fall amount in millimeters for a raingage. Either the
RRATE
field or the
RFALL
field must be present for each reported gage.
Z/R ccc.c e.ee
Optional field that is available from disdrometer type raingages capable of calculating
a
Z/R relationship. The numbers are the constant and exponent in the equation Z =
CR
E
. When there is no rain, or the disdrometer is unable to make a measurement, the
values of 0.0 are sent for both numbers. This is interpreted as a special flag to indicate
that the default values should be used.
QUAL nn
The data quality (0:Useless, 10:Best) for a rain gage report. This field is optional. If it is
omitted the data quality is assumed to be "10" (Best).
REM xxxxxxxxxxx
Allows a comment to be inserted in the file. An arbitrary text field follows. Use quotes
around comments if the comment includes white space.
The following example shows rain gage data for 5 sites during a 60-minute time span
ending at 22:00 on 10 July 2000. Note that the exact columns and the numerical precision
may vary, as does the order of keywords on each line.
REM "Example format of an IRIS Rain Gage input file" TIME 200007102200 SPAN 60
CODE 001213 LONLAT 127.312533 38.172512 RRATE 4.5
CODE 000223 LONLAT 127.2223 38.2155 RRATE 2.2
CODE 000095 LONLAT 127.31 38.2283 RFALL 0.083
LONLAT 127.1214 38.1825 QUAL 0 RRATE 1.2 REM "Gage broken"
CODE 000122
CODE 000109 RRATE 1.1 LONLAT 127.2884 38.1277
Appendix E – Hydromet Raingage Correction
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