2026-09-22T08:55:50Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/85187 2023-07-11 col_2142_5131 col_2142_14807 com_2142_5130 com_2142_14806 com_2142_8903

2008 Leslie Looney Shiao, Yu-Shao 2015-09-25T22:35:38Z 2015-09-25T22:35:38Z 10000-01-01 2008 Ground-based interferometric observations are severely affected by atmospheric conditions. Phase correction is a technique to obtain high quality data and achieve great scientific goals. For our acetic acid survey, a better phase correction technique can not only detect weaker transitions of large molecules, but also increase the map resolution of hot cores. Water vapor radiometers (WVRs) are designed to improve the technique by observing tropospheric water vapor along the lines of sight of interferometers. We have numerically demonstrated the importance of phase correction for interferometric observations and examined the water vapor phase correction technique. Furthermore, we have built two WVR prototypes with new calibration, thermal regulation and backend systems. The WVR prototypes had been tested in a laboratory, on a roof and at the CARMA site to verify their performance. We conclude the WVR thermal stability and dynamic range are critical while the enormous and rapid fluctuations of the sky background emission overwhelm the WVR dynamic range and degrade the WVR sensitivity. Made available in DSpace on 2015-09-25T22:35:38Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3337928.pdf: 6482279 bytes, checksum: 0f901fd91d813d2e134e847ce0a08caa (MD5) Previous issue date: 2008 Embargo set by: Seth Robbins for item 86468 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 130 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2008. http://hdl.handle.net/2142/85187 (MiAaPQ)AAI3337928 eng Physics, Astronomy and Astrophysics High Resolution Acetic Acid Survey and Water Vapor Radiometer text Astronomy Astronomy University of Illinois at Urbana-Champaign Dissertation Ph.D.