PIERS Rain gauge network
In this case, PIERS stands for Precipitation Instrument Evaluation and Research Sites,
named in honor of Piers Sellers — a NASA astronaut and climate scientist renowned
for his contributions to Earth science and space exploration.
0007_B Rain gauge ID. Each gauge is equipped with two buckets, labeled 'A' and 'B'
2025 Year
gag Product ID (reformated gauge tip data)
V05 Version number
txt Text format
File header
2025 PIERS 0007_B MetOne 0.254 mm
2015 PIERS 0007_B Same as in file name MetOne Gauge type 0.254 mm Gauge bucket size
Data format
Year Mon Day Jday Hr Min Sec Rain[mm] Lat Lon
........................................................
2025 01 03 003 21 30 00 0.000 37.91287 -75.57986
2025 01 03 003 21 45 00 0.000 37.91287 -75.57986
2025 01 03 003 22 00 00 0.000 37.91287 -75.57986
2025 01 03 003 22 15 00 0.000 37.91287 -75.57986
2025 01 03 003 22 30 00 0.000 37.91287 -75.57986
2025 01 03 003 22 45 00 0.000 37.91287 -75.57986
2025 01 03 003 23 00 00 0.000 37.91287 -75.57986
2025 01 03 003 23 15 00 0.000 37.91287 -75.57986
2025 01 03 003 23 19 48 0.254 37.91287 -75.57986
2025 01 03 003 23 44 55 0.254 37.91287 -75.57986
2025 01 04 004 00 00 00 0.000 37.91287 -75.57986
2025 01 04 004 00 30 00 0.000 37.91287 -75.57986
2025 01 04 004 00 45 00 0.000 37.91287 -75.57986
........................................................
2025 01 06 006 16 42 18 0.254 37.91287 -75.57986
2025 01 06 006 17 00 00 -9.999 -99.99999 -999.99999
2025 01 06 006 17 05 19 1.016 37.91287 -75.57986 Q
2025 01 06 006 17 08 07 0.254 37.91287 -75.57986
2025 01 06 006 17 12 38 0.254 37.91287 -75.57986
2025 01 06 006 17 30 00 -9.999 -99.99999 -999.99999
2025 01 06 006 17 45 00 -9.999 -99.99999 -999.99999
2025 01 06 006 18 00 00 -9.999 -99.99999 -999.99999
2025 01 06 006 18 15 00 -9.999 -99.99999 -999.99999
2025 01 06 006 18 30 00 -9.999 -99.99999 -999.99999
2025 01 06 006 18 45 00 -9.999 -99.99999 -999.99999
2025 01 06 006 19 00 00 -9.999 -99.99999 -999.99999
2025 01 06 006 19 04 37 5.588 37.91287 -75.57986 Q
2025 01 06 006 19 17 04 0.254 37.91287 -75.57986
2025 01 06 006 19 29 49 0.254 37.91287 -75.57986
........................................................
There are 11 data fields:
1) year
2) month
3) day of month
4) Julian Day of year
5) hour in UTC
6) minute
7) second
8) rain[mm] (eg. 1 tip = 0.254 mm).
"0.000" indicates no rain, while "-9.999" represents missing data for each 15-minute interval.
9) Latitude in degree. missing: -99.99999
10) Longitude in degree. missing: -999.99999
11) Q: questionable.
Typically occurs after missing data, where multiple tips could be accumulated into a single entry.