1 / 17

Atmospheric Wind Measurement WindSat

Atmospheric Wind Measurement WindSat. University of Colorado at Colorado Springs WindSat Team: Rodger Mourning Courtnee Applegate Justin Perkins Anna Stanko Faculty Advisor: Dr. Jason Roney. Presentation Agenda. WindSat project overview Flight summaries Results Conclusions

Download Presentation

Atmospheric Wind Measurement WindSat

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Atmospheric Wind MeasurementWindSat University of Colorado at Colorado Springs WindSat Team: Rodger Mourning Courtnee Applegate Justin Perkins Anna Stanko Faculty Advisor: Dr. Jason Roney

  2. Presentation Agenda WindSat project overview Flight summaries Results Conclusions Questions

  3. WindSat Challenge • Measurement of wind speed and direction. (Anemometer could not be used) • Payload mass limit of 1.8 kg. • Dimensional limit of 20 cm. • Harsh environment and conditions. (-60 degrees C, 0 kPa) • Landing impact survival.

  4. WindSat Applications • Space Missions / Research: Determination of atmospheric conditions prior to a planetary explorer descent can greatly decrease the chance of mission failure. • Atmospheric Research: Direct wind measurement would improve weather models.

  5. WindSat Design WindSat1 Systems: • Wind Measurement System • Four Pitot static probe configuration. • Four differential pressure transducers. • Four channel data logger (MicroDaq). • Type T Thermocouple (HOBO) • Pressure, Humidity, Temperature Sensor (MicroDaq). • Electric heater with thermostat. WindSat2 Revisions: • Rudder and bearings for wind alignment.

  6. WindSat Design WindSat1 WindSat2 Instrument Mounting Module

  7. Instrument Testing • Preliminary tests were exploratory. • Determine variables of dependency. • Become familiar with instruments (operating range, etc.) • Pressure transducer calibration. • Pitot tube wind tunnel testing. • Instrument accuracy verification.

  8. WindSat1 Flight Summary • Maximum altitude: 30.4 km (99,760 ft) • Maximum ground speed: 35 m/s (79 mph) • Minimum temperature: -61 C (-77 F)

  9. WindSat2 Flight Summary • Maximum altitude: 12.4 km (40,600 ft) (Ice accumulation ended ascent) • Maximum ground speed: 31 m/s (70.6 mph) • Minimum temperature: -61 C (-77 F)

  10. Temperature Results Lapse Rates: EOSS 71 0 to 15 km: B1 = -7.24 K/km 15 to 30 km: B2 = 1.87 K/km EOSS 73 0 to 12 km: B = -7.36 K/km U.S. Standard Atmosphere 0 to 11 km: B = -6.5 K/km

  11. Pressure Results Pressure Profile:

  12. Wind Speed Results Atmospheric winds: Absolute wind speed = Mean wind speed + Relative gust speed Vw = Vm + Vg

  13. Mean Wind Speeds Determined from GPS tracking data. EOSS 71: For0 < z < 13 km Vm = (0.0026293)Z - 6.8 m/s Average directional heading = 135 SE For13 km < z < 20 km Vm = (-0.003401)Z + 64.4457 m/s Average directional heading = 258 WSW For20 km < z < 30 km Vm = (0.0017857)Z - 32.14 m/s Average directional heading = 258 WSW EOSS 73: For 0 < z < 12 km Vm = (0.0025263)Z - 0.84 m/s Average directional heading = 79º ENE (Where Vm = mean wind speed (m/s), and Z = altitude (m))

  14. Wind Gust Speeds Determined through Pitot tube measurements. A FFT analysis showed no significant frequencies in the energy spectrum. Mean Wind Gust Speeds: EOSS 71: Equation 1 Vg = [(7.143E-4)Z + 2] m/s EOSS 73: Equation 2 Vg = [(8.5E-4)Z + 2] m/s (Where Z = altitude (m))

  15. Conclusions • Mission goals were met. • Need for planetary explorer pre-landing probe. • Improvement of weather models.

  16. References NASA: http://marsweb.jpl.nasa.gov/msp98/msss/mardi_hardware/history/huygens/index.html http://marsweb.jpl.nasa.gov/msp98/lander/m9821.jpg National Oceanic and Atmospheric Administration (NOAA): http://www.noaa.org/ http://www.npoess.noaa.gov/images/wind_speed.jpg

  17. Questions ?

More Related