GPM Ground Validation Met One Rain Gauge Pairs IFloodS
Table of Contents
Introduction
The GPM Ground Validation Met One Rain Gauge Pairs IFloodS data set was collected using Met One Model 380 tipping bucket precipitation gauges at 25 sites in Iowa during the Iowa Flood Studies (IFloodS) ground measurement campaign in 2013. The data set contains quality controlled reformatted rain data recorded in millimeters at a temporal resolution of 1 second and cubic spline interpolated rain rates recorded in millimeters per hour. The information is available in .txt text files.
Citation
The following example shows how to cite the use of this data set in a publication. For more information, please see our Citing GHRC DAAC and Data page.
Petersen, W., D. Wolff, J. Wang, G. Cutrell. 2014. GPM Ground Validation Met One Rain Gauge Pairs IFloodS [indicate subset used]. Data set available online [http://ghrc.nsstc.nasa.gov/] from the NASA EOSDIS Global Hydrology Resource Center Distributed Active Archive Center Huntsville, Alabama, U.S.A. doi: Coming Soon
Campaign
The Iowa Flood Studies (IFloodS) was a ground measurement campaign that took place in eastern Iowa from May 1 to June 15, 2013. The goals of the campaign were to collect detailed measurements of precipitation at the Earth's surface using ground instruments and advanced weather radars and, simultaneously, collect data from satellites passing overhead. The ground instruments characterized precipitation -- the size and shape of raindrops, the physics of ice and liquid particles throughout the cloud and below as it falls, temperature, air moisture, and distribution of different size droplets -- to improve rainfall estimates from the satellites, and in particular the algorithms that interpret raw data for the upcoming Global Precipitation Measurement (GPM) mission's Core Observatory satellite, which launches in 2014.
The rain gauges were located at 25 sites in central to northeastern Iowa. The geographic locations of each rain gauge pair (gauges A & B) are:
Site |
Lat. |
Lon. |
NASA0026 |
43° 22' 13.7814" |
-92° 22' 8.3712" |
NASA0027 |
43° 7' 23.4948" |
-92° 8' 48.03" |
NASA0028 |
43° 2' 32.175" |
-91° 57' 46.9692" |
NASA0029 |
42° 48' 50.6658" |
-91° 40' 5.5776" |
NASA0030 |
43° 13' 36.8256" |
-92° 17' 53.8794" |
NASA0031 |
43° 16' 15.1566" |
-92° 1' 50.736" |
NASA0032 |
42° 55' 32.127" |
-91° 40' 20.6574" |
NASA0033 |
43° 3' 8.985" |
-91° 31' 7.8702" |
NASA0034 |
42° 55' 4.1376" |
-91° 56' 33.993" |
NASA0035 |
43° 6' 11.1744" |
-91° 45' 17.8734" |
NASA0036 |
42° 43' 2.9784" |
-91° 11' 23.406" |
NASA0037 |
42° 58' 42.8586" |
-91° 18' 48.078" |
NASA0038 |
42° 50' 37.611" |
-91° 23' 49.8516" |
NASA0039 |
43° 11' 7.4076" |
-91° 52' 38.748" |
NASA0040 |
42° 46' 32.196" |
-91° 27' 12.2034" |
NASA0041 |
43° 19' 51.2538" |
-92° 13' 6.1242" |
NASA0042 |
42° 50' 33.5106" |
-91° 47' 25.9182" |
NASA0043 |
42° 53' 29.5974" |
-91° 34' 0.678" |
NASA0044 |
42° 58' 44.6412" |
-91° 47' 15.8604" |
NASA0045 |
42° 38' 39.069" |
-91° 23' 2.4576" |
NASA0046 |
42° 18' 17.4312" |
-93° 29' 1.0896" |
NASA0047 |
42° 23' 56.0394" |
-93° 26' 39.339" |
NASA0048 |
42° 17' 52.1304" |
-93° 31' 14.3322" |
NASA0049 |
42° 38' 13.8984" |
-93° 20' 28.2552" |
NASA0050 |
42° 27' 4.6758" |
-93° 13' 57.1866" |
Further details on the IFloodS campaign are available at http://gpm.nsstc.nasa.gov/ifloods. Additional information about the Iowa Flood Center can be found at http://iowafloodcenter.org. Information on the Global Precipitation Measurement (GPM) mission is available at http://pmm.nasa.gov/GPM.
Instrument Description
The Model 380 precipitation gauge, manufactured by Met One Instruments Inc., is a tipping bucket rain gauge which measures the amount of fallen precipitation. The gauge has a 12 inch (30.5 cm) diameter catchment funnel that directs precipitation to a tipping bucket assembly. When .01 inch (.254 mm) of precipitation is collected, the tipping bucket assembly tips, draining the collection and activating a mercury switch for recording data.
More detailed information on the Met One Model 380 Precipitation Gauge is available at http://www.metone.com/documents/370 - 380 Precipitation Gauges.pdf.
Investigators
Walter A. Petersen
NASA Wallops Flight Facility
Wallops Island, VA 233375
David B. Wolff
NASA Wallops Flight Facility
Wallops Island, VA 233375
File Naming Convention
The GPM Ground Validation Met One Rain Gauge Pairs IFloodS data set consists of .txt text files. The files are named with the following convention:
ifloods_raingauge_NASA00##[A|B]_[YYYYMMDD_start]_[YYYYMMDD_end]_[gag|gmin].txt
where,
ifloods = Iowa Flood Studies
raingauge = Met One Model 380 Precipitation Gauge
NASA00## =
rain gauge number
[A|B]
= rain gauge letter (A or B)
YYYYMMDD_start = the year, month, and day of the data's start date (e.g. 20130418)
YYYYMMDD_end = the year, month, and day of the data's end date (e.g. 20130625)
[gag|gmin] = gag or gmin, where gag refers to quality controlled reformatted rainfall data (mm) and gmin refers to cubic spline interpolated rain rates(mm/h) calculated using the algorithm of Wang et al. 2008 (See References)
.txt = text file
The files contain measurements of fallen precipitation at recorded points in time and cubic spline interpolated rain rates during the study period.
Data Format
The GPM Ground Validation Met One Rain Gauge Pairs IFloodS data set is comprised of .txt text files.
References
Wang, J., B. L. Fisher, and D. B. Wolff, 2008: Estimating rain rates from tipping-bucket rain gauge measurements. J. Atmos. Oceanic Technol., 25, 43-56.
doi: 10.1175/2007JTECHA895.1
Wang, J., and D. B. Wolff, 2012: Evaluation of TRMM rain estimates using ground measurements over central Florida. J. Appl. Meteor. Climatol., 51, 926-940.
doi: 10.1175/JAMC-D-11-080.1
Wang, J., and D. B. Wolff, 2010: Evaluation of TRMM ground-validation radar-rain errors using rain gauge measurements. J. Appl. Meteor. Climatol., 49, 310-24.
doi: 10.1175/2009JAMC2264.1
Contact Information
To order these data or for further information, please contact:
Global Hydrology Resource Center
User Services
320 Sparkman Drive
Huntsville, AL 35805
Phone: 256-961-7932
E-mail: support-ghrc@earthdata.nasa.gov
Web: http://ghrc.nsstc.nasa.gov/
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