University of Washington, Dept of Atmospheric Sciences
High resolution Atmospheric Pressure
J. E. Tillman and Neal C. Johnson
These instruments are located at the Department of Atmospheric
Sciences, University of Washington, Seattle Washington. They are approximately
33.5 meters (110 feet) above mean sea level. In typical atmospheric conditions
this sensor reads approximately 4 millibars lower than it would at MSL.
The sensor plotted in red, called the primary
sensor below, has been running
continuously since 1993 with the factory calibration. The newer
sensor in blue has been running with the
factory calibration since 2000.
sensor, developed by Vaisala Oy,
Helsinki, Finland, is identical to that used for the Russian Mars 96
Program; their program includes European & US collaboration. We
gratefully acknowledge Risto Pellinen and Ari-Matti Harri, Finnish
Space Science Institute, for providing the sensor and Pekka Jarvi
of Vaisala Oy, Helsinki, Finland , for integrating it into a
commercial instrument and calibrating it for us.
Support was provided by NASA Headquarters ( Planetary Instruments
Program ) and Jet Propulsion Laboratory. James E. Tillman, Neal
C. Johnson and Fred Weller, UW, developed and maintain the system and