1. Radiometers and Platforms for Absolute Measurements of the Moon Steven R. Lorentz L-1 Standards and Technology, Inc. Lorentz@L-1.biz 28 September 2005 Gaithersburg, MD

2. Introduction  Goal – how to achieve useful measurements with the moon?  What is useful? And to Whom? Do we need a broader buy-in from EOS users?  What ever we do, it must be retrievable with multiple flights!  Suggest both starting small and looking for avenues for a larger program.

3. Atmospheric Absorption Borrowed from LASP website

4. Radiometer Choices?  Irradiance or Radiance?  Simple Filter Radiometer  Single detector with filter wheel  Possible to add a spectrometer and use Filter Radiometers to maintain scale.  Use SIRCUS to calibrate all of the above.

5. Platforms  Balloon F Up to 100,000 ft pressure is ~1% of sea level  UAV F Several years and several dollars  Airplane F SOFIA – 747 based IR telescope start flights in 2007 F 40,000 to 45,000 feet F 20% of sea level, but H 2 0 is reduced by 1000 F Telescope limited to +20 to +60 Degrees Elevation  Other piggy back opportunities  Free Flyer?  Shuttle?