+ Visit NASA.gov + Contact NASA   + Home Select Search Field * All Report - Patent Number Abstract *Accession Number *NASA Center *Author NameDocument IDKeywordsPublication Date *Title * Find Results With All of the words At least one of the words Enter Search Term  within returned results    Search Tips: Use only the fields with * to search NIX collection. Enclose terms in double quotation marks (") to search for exact phrases, ie: "space shuttle". NOTE: Commas and dashes are removed from search term by search engine. Select Reset Search button to start a new search. See Help for more tips. + NASA Center + Publication Year + Subject + Availability Options + Item/Media Type Selected Navigations: Author > Heymsfield, Gerald [x] Sort results by: NASA Center | Date Added to NTRS | Publication Year There are a total of 17 record(s) matching your query. Sorted by: Date Added To NTRS in Descending order 1 2 Next  X-Band Radar for Studies of Tropical Storms from High Altitude UAV Platform Author(s): Rodriquez, Shannon; Heymsfield, Gerald; Li, Lihua; Bradley, Damon Abstract: The increased role of unmanned aerial vehicles (UAV) in NASA's suborbital program has created a strong interest in the development of instruments with new capabilities, more compact sizes and reduced weights than the ... NASA Center: Goddard Space Flight Center Publication Year: 2007 Added to NTRS: 2007-12-27 Document ID: 20070038285 Development of High Altitude UAV Weather Radars for Hurricane Research Author(s): Heymsfield, Gerald; Li, Li-Hua Abstract: A proposed effort within NASA called (ASHE) over the past few years was aimed at studying the genesis of tropical disturbances off the east coast of Africa. This effort was focused on using an instrumented Global Hawk UAV ... NASA Center: Goddard Space Flight Center Publication Year: 2005 Added to NTRS: 2005-05-17 Document ID: 20050156629 Graupel and Snow Determination in Convection Using Dual-Wavelength Radar Author(s): Heymsfield, Gerald; Tian, L.; Heymsfield, A.; Belcher, L.; Li, L. Abstract: Convective storms contain significant amounts of snow and graupel that each have different scattering properties for radar and radiometer remote sensing. TRMM TMI algorithms have relied heavily on radiative transfer ... NASA Center: Goddard Space Flight Center Publication Year: 2004 Added to NTRS: 2004-12-03 Document ID: 20040171265 ER-2 Observations of Precipitation Systems During TRMM-LBA Author(s): Heymsfield, Gerald; Tian, Lin; Geerts, Bart Abstract: The NASA ER-2 performed numerous flights over precipitation systems in Rondonia, Brazil. The ER-2 carried a payload including the ER-2 Doppler Radar (EDOP), the Advanced Microwave Precipitation Radiometer (AMPR), the ... NASA Center: Goddard Space Flight Center Publication Year: 1999 Added to NTRS: 2004-11-03 Document ID: 20000027510 Measurements and Calculations of Microwave Radiance and Reflectivity for Storm-Associated Frozen Hydrometeors Author(s): Wang, James R.; Skofronick-Jackson, Gail; Meneghini, Robert; Heymsfield, Gerald; Manning, Will Abstract: During the TEFLUN-B (Texas-Florida under-flights for the Tropical Rainfall Measuring Mission (TRMM)) field experiment of August-September, 1998, a number of ER-2 aircraft flights with a host of microwave instruments were ... NASA Center: Goddard Space Flight Center Publication Year: 2000 Added to NTRS: 2004-11-03 Document ID: 20000118229 The Relationship of Tropical Cyclone Convective Intensity to Passive Microwave Observations Author(s): Hood, Robbie E.; Guillory, Anthony; LaFontaine, Frank J.; Cecil, Dan; Heymsfield, Gerald Abstract: During the 1998 and 2001 hurricane seasons, the Advanced Microwave Precipitation Radiometer (AMPR) was flown aboard the National Aeronautics and Space Administration (NASA) ER-2 high altitude aircraft as part of the Third ... NASA Center: Marshall Space Flight Center Publication Year: 2002 Added to NTRS: 2004-11-03 Document ID: 20020050358 TRMM Field Campaigns: Objectives and Status Report Author(s): Zipser, Edward I.; Heymsfield, Gerald; Kummerow, Christian; Simpson, Joanne; Thiele, Otto; Rutledge, Steven; Dias, Maria Assuncio Silva; Houze, Robert A., Jr.; Yuter, Sandra; Kakar, Ramesh Abstract: The Tropical Rainfall Measuring Mission (TRMM) satellite has been sending valuable data since launch in November 1997. Some of the key goals of the joint NASA (US) and NASDA (Japan) mission are: (1) to estimate the ... NASA Center: Goddard Space Flight Center Publication Year: 1999 Added to NTRS: 2004-11-03 Document ID: 19990102879 Convective Bursts and Hot Towers Observed During CAMEX-3 and CAMEX-4 Author(s): Heymsfield, Gerald Abstract: The role of convective bursts in the inner core regions of tropical storms has been if interest for many years with respect to their role in intensification. The structure of these convective bursts is best observed in ... NASA Center: Goddard Space Flight Center Publication Year: 2002 Added to NTRS: 2004-11-03 Document ID: 20040013029 Measurements and Calculations of Microwave Radiance and Reflectivity for Storm-Associated Frozen Hydrometeors Author(s): Wang, James R.; Sfokronick, Gail; Meneghini, Robert; Heymsfield, Gerald; Manning, Will Abstract: During the TEFLUN-B (Texas-Florida under-flights for TRMM) field experiment of August-September, 1998, a number of ER-2 aircraft flights with a host of microwave instruments were conducted over many convective storms, ... NASA Center: Goddard Space Flight Center Publication Year: 2000 Added to NTRS: 2004-11-03 Document ID: 20010098007 ER-2 Observations of Precipitation Systems During TRMM-LBA Author(s): Heymsfield, Gerald; Tian, Lin; Geerts, Bart Abstract: The NASA ER-2 performed numerous flights over precipitation systems in Rondonia, Brazil. The ER-2 carried a payload including the ER-2 Doppler Radar (EDOP), the Advanced Microwave Precipitation Radiometer (AMPR), the ... NASA Center: Goddard Space Flight Center Publication Year: 1999 Added to NTRS: 2004-11-03 Document ID: 20000011202 1 2 Next  + Back to Top + Sponsored by the NASA Scientific and Technical    Information Program + 2004 Vision for Space Exploration + Freedom of Information Act + NASA Web Privacy Policy and Important Notices + NASA Disclaimers, Copyright Notice,    and Terms and Conditions of Use NASA Official: Calvin Mackey Page Curator: NASA Center for AeroSpace Information (help@sti.nasa.gov) Last Updated: July 5, 2007