Valparaiso University


  • Gary Morris


Ozonesonde Systems:

Ozonesonde will be launched from the UH Main Campus in coordination with the University of Houston faculty and student teams throughout the SHARP mission period. Two different types of sondes will be launched:

  • Standard: pressure, temperature, relative humidity, latitude, longitude, altitude, wind speed, wind direction, ozone
  • Dual sondes: pressure, temperature, relative humidity, latitude, longitude, altitude, wind speed, wind direction, ozone, sulfur dioxide

We plan to launch ~10 standard ozonesondes and ~8 dual sondes.

dual sonde system


We will use the NASA Goddard Space Flight Center Trajectory Model to produce back trajectory information. Parcels are initialized on a uniform grid, 2 deg. lat. by 2.5 deg. lon. centered on Houston (29.72 N, 95.33 W) every 0.5 deg in lat. and lon. and every 0.5 km altitude from 0.5 km to 5.0 km. Trajectories are started TOMORROW and run backwards for 7 days, using NCEP 1 X 1 gridded meteorological data. For the first 36 hours of the back trajectory run, forecast data are used to calculate the back trajectories. For the last 5.5 days of the calculations, analysis fields are used. The Trajectory Model is run in kinematic mode, so vertical motions are taken into account.



Provide profiles of ozone with launches at dawn and in early afternoon, the former to detect ozone in the residual layer and plumes of SO2 from the ship channel when winds are favorable, the latter to examine the profile during the afternoon peak near the the time of the Aura satellite overpass (~2:30 pm CDT). We will be coordinating at least some of our afternoon launches with the TES instrument team, which will run special observations over the Houston area during SHARP.


Provide trajectory simulations to indicate the source regions for air entering Houston. These data should be helpful to researchers trying to separate local from distant influences on measured pollution levels. Because they are run in forecast mode, these simulations should also be helpful in flight planning for the next day (i.e., tomorrow's flight).

Additional information

Project data will be found on the sites and

valpo/home.txt · Last modified: 2009/04/11 10:44 by gmorris
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