PIA04909: Radiation Environment at Mars and Earth
Target Name: Mars
Is a satellite of: Sol (our sun)
Mission: 2001 Mars Odyssey
Spacecraft: 2001 Mars Odyssey
Instrument: Mars Radiation Experiment
Product Size: 907 x 621 pixels (width x height)
Produced By: Johnson Space Center
Full-Res TIFF: PIA04909.tif (348.2 kB)
Full-Res JPEG: PIA04909.jpg (102.2 kB)

Click on the image above to download a moderately sized image in JPEG format (possibly reduced in size from original)

Original Caption Released with Image:
December 8, 2003

This graphic shows the radiation dose equivalent as measured by Odyssey's martian radiation environment experiment at Mars and by instruments aboard the Earth-orbiting International Space Station (ISS), for the 18-month period from April 2002 through October 2003. The accumulated total in Mars orbit is just over two times larger than that aboard the Space Station. The bars where the Mars instrument's measurements are well above the average (as shown by the orange line) are months when there was significant solar activity, which increases the dose equivalent. Dose equivalent is expressed in units of milliSieverts per day.

NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington. The radiation experiment was provided by the Johnson Space Center, Houston, Texas. Lockheed Martin Space Systems, Denver, Colo., is the prime contractor for the project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.

Image Credit:
NASA/JPL/Johnson Space Center

Image Addition Date:
2003-12-08