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Advancements in NASA SLWC Sonde Development: A Historical Overview (1997-2013)

This overview highlights the key milestones in the development of sonde-based liquid water content (LWC) measurement devices at NASA Glenn Research Center. Starting with initial contracts by CRREL and NCAR with ATEK in 1997, significant testing occurred until 2001. Following this, Anasphere, Inc. developed a prototype under NASA's SBIR program, which underwent further testing in 2012, leading to the delivery of 40 configured sondes. By 2013, NASA expanded its capabilities through additional training and acquisition of equipment, marking a significant progression towards commercial product readiness.

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Advancements in NASA SLWC Sonde Development: A Historical Overview (1997-2013)

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  1. NASA Sonde Development Activities Andy Reehorst NASA Glenn Research Center

  2. SLWC Sonde History • CRREL and NCAR had contracts with ATEK (Geoff Hill) to develop a sonde-based LWC measurement device • ATEK sondes were flown at Cleveland in 1997 and MWISP, April 1999 • Following some low-level development activity, ATEK sondes also flown from Lorain County Airport, April 2001

  3. NASA SLWC Sonde Development-2012 • Anasphere, Inc, of Bozeman, MT developed prototype SLWC sonde under NASA SBIR • SBIR version tested by NCAR/NOAA/Radiometrics team in Feb/Mar 2012 • Further development under NASA AvSP funding to reach “commercial product” status • Sonde redesign, build, and test (tunnel) completed Nov 2012 • 40 sondes delivered to NASA, configured to operate with InterMet iMet-1 sondes

  4. NASA SLWC Sonde Development-2013 • NASA purchased InterMet ground station and received training in Boulder and Cleveland • NASA purchased 100 InterMet sondes and expendables • NASA SBIR Phase I awarded to Anasphere for droplet sizing concept • Phase I report and Phase II proposal due for completion on Nov 23, 2013

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