TRMM x Google Earth Laboratory


What's TRMM?
TRMM means "the Tropical Rainfall Measuring Mission". Here, you can get detailed information and also view it on Google Earth.

  • 1.Satellites Height
  • 2.Orbit track of TRMM
  • 3.About Sensor
サブロゴ a) How many height TRMM satellite?

TRMM satelite are flying 400km above us. It is the same distance of Tokyo to Osaka.

Let's show TRMM Satellite position by Google Earth.

サブロゴ b) Let's compare satellites height.

By using this KML file, you can see the TRMM and other satellite's positions.

Let's compare other sattelites by Google Earth

TRMM satellite flies lower than other earth observation satellites.

サブロゴ c) How many height Himawari satellite

You can jump to Himawari Satellite on Google Earth.

Geostationary orbit satellite's position is higher than other satellites.

サブロゴ a) Daily satellite tracks

This KML file shows daily satellite tracks of TRMM.

TRMM Track at 2007/1/2

Click "Play" button on Upper Right side. TRMM satellite will move on Google Earth.

サブロゴ b) North and south limit

TRMM satellite is moving from 37 degree south to 37 degree north, coz the main observation target of TRMM is "Tropical Rain Fall".


サブロゴ a) PR: Precipitation Radar

The Precipitation Radar(PR) onboard TRMM is the first spaceborne rain in the world. Major objectives of PR are (1) to provide 3-dimensional rainfall structure, (2)to achieve quantitative rainfall measurement over land as well as over ocean, and (3) to improve the accuracy of TRMM Microwave Imager (TMI) measurement by providing the rain structure information.

サブロゴ b) TMI: TRMM Microwave Imager

The TMI is a multi-channel / dual-polarized microwave radiometer which will provide data related to rainfall rates over the oceans. The TMI data together with PR data will be the primary data set of precipitation measurement. The TMI data combined with the data from the PR and VIRS will also be utilized for deriving precipitation profile.

サブロゴ c) VIRS: Visible Infrared Scanner

The VIRS is a passive cross-track scanning radiometer which measures scene radiance in five spectral bands operating in the visible through the infrared spectral regions. Comparison of the microwave, visible and infrared data is expected to provide the means whereby precipitation will be estimated more conclusively by visible and infrared data alone.