This is a gridded data set of precipitation over the region of approximately 160 km by 160 km in West Sumatra for the period of one month during from October 28 to November 27 in 2006. This data set is made by combination of radar and raingauge observations. The radar observations are gotten by a X-band Doppler weather radar which is installed near Minangkabau International Airport (MIA) in West Sumatra. And the raingauge observations are gotten from a network of ground-based rain gauges deployed over West Sumatra. In this data, there are data voids due to mountain shadow which can be recognised by analysing visibility of objects from the radar with a digital elevation model. (West Sumatra is a province of Indonesia, which is the near-equator part along the west coast of Sumatra Island.)		Sample of the distribution of rainfall rate derived from radar and raingauge observations.

Integrated data set:

Name of data set:	Radar-raingauge combined gridded precipitation data (West Sumatra)
Data format:	grid-point data. simple binary files (single-precision floating-point) with a separate GrADS control file
Organization of data:	one file for one day
Coordinates:	longitude and latitude
Spatial extent:	99.55--101.05 degrees East, 1.55--0.05 degrees South
Spatial resolution:	0.025 degrees (1.5 minutes) longitude and latitude
Time period:	October 28 to November 27, 2006 (31 days)
Time resolution:	30 minutes
Size of data:	approximately 20 MB

Version History

• Ver. 1.0: Released 2008-01-10.
• Ver. 1.1: Released 2009-09-01: Revised from Ver.1.0. For further detail please refer to the document.

Original data set 1:

In October 2006, an X-band Doppler radar (XDR) was installed at the position of 100.30 degrees East and 0.78 degrees South near the Minangkabau International Airport (MIA) in a suburb of Padang, West Sumatra, Indonesia. This radar installation is a part of the Hydro-meteorological Array for ISV-Monsoon Auto-monitoring (HARIMAU) which is one of Japan Earth Observing System (EOS) Promotion Programs (JEPPs) under the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan.
 

Name of data set:	MIA-XDR reflectivity data, CAPPI (Constant Altitude Plan Positioning Indicator)
Data format:	grid-point data; simple binary files (single-precision floating-point) with a separate GrADS control file
Organization of data:	one file for one hour
Coordinates:	Cartesian (3-dimensional rectangular)
Spatial extent:	160 km east-west and north-south each horizontally 0.5 to 20 km vertically
Spatial resolution:	0.5 km both horizontal and vertical
Time period:	October 28 to November 27, 2006 (31 days)
Time resolution:	6 minutes
Size of data:	approximately 123 GB

 
You can find further details of HARIMAU and MIA-XDR from
Web page of HARIMAU:http://www.jamstec.go.jp/iorgc/harimau/
Web page of MIA-XDR:http://www.jamstec.go.jp/iorgc/harimau/mia_realtime.html
 

Original data set 2:

This data set contains precipitation data in West Sumatra from surface raingauge network which is maintained by IORGC of JAMSTEC in collaboration with BPPT (Agency for Assessment and Application of Technology) and BMG (Meteorological and Geophysical Agency) of Indonesia. Rainfall data are measured and recorded by tipping-bucket type raingauges. Raingauges at 2 stations are part of automatic weather stations (AWSs), for which the count of tipping is recorded every minute. The size of buckets corresponds to 0.2 mm of precipitation at Tiku and 0.5 mm at Tabing. Raingauges at the other 6 points are self-standing recording raingauges, for which the time of tipping is recorded at every tipping. The size of buckets corresponds to 0.5 mm of precipitation.
 
This data set outline is followed as:

Name of data set:	West Sumatra surface raingauge network data
Data format:	time-series data; ASCII text
Organization of data:	one file for one station point
Time period:	October 28 to November 27, 2006 (31 days)
Time resolution:	1 minute for AWS stations, irregular for self-standing raingauge stations

 
 

Original data set 3:

This is a digital elevation model data set produced by the Shuttle Radar Topography Mission of the U.S. NASA (Natinal Aeronautics and Space Administration). Just the part which was used in the production of our integrated data is mentioned.  
 

Name of data set:	SRTM3 DEM version 2
Data format:	gridpoint data; simple binary (signed two-byte integer)
Organization of data:	one file for one by one degree longitude and latitude
Coordinates:	longitude and latitude
Spatial extent:	99 to 102 degrees East, 2 degrees South to 1 degree North
Spatial resolution:	3 arc-seconds longitude and latitude (approximately 90 metres)
Size of data:	approximately 25 MB

 
You can find further details of SRTM from
Web page of SRTM at Jet Propulsion Laboratory http://www.jpl.nasa.gov/srtm/ ;
Farr, T. G., et al. (2007), The Shuttle Radar Topography Mission.
    Reviews in Geophysics, 45, RG2004, doi:10.1029/2005RG000183.