WMOD00426

• Title: Desert Research Institute Fields Operations - 1994 NOAA/UTAH Field Program - Final Report
• Date: 11/1/1994
• Weather Modification - Doc Type: Report

Table 1. Summary of 1994 NOAA/Utah Soundings from Ml Pleasant, Utah
DATE TIME MAX LEVEL EDITING COMMENTS
(MST) (mb)
21 Februarv 0915 273 2 temp's corrected. winds okay
21 February 1110 273 Deleted winds 793-764 mb
22 February 0728 251 1 temp corrected; missing winds 787-689 rnb
and above 304 mb
22 February 0905 262 1 temp corrected; winds okay
22 February 1029 291 2 temp's corrected; winds okay
27 February 0801 283 Minute 5 wind missing
27 February 1008 285 1 temp corrected; winds okay
27 February 1200 295 1 temp corrected; winds okay
27 February 1402 273 1 temp corrected; winds okay
10 March 1120 150 2 press's, 4 temp's corrected; winds okay
10 March 1439 216 okay

In addition, the 1994 soundings were combined with 1991 soundings and the total
sample of 80 soundings was also analyzed from the same two altitudes. The results are
presented in Table 2, along with the prior analyses of 1991 soundings. The combined
analysis results using the 2982 m base altitude will be used to process the 1994 data
from the U.S. Bureau of Reclamation (USBR) stationary radiometer, which was positioned
at RRS in Fig. 1.
Finally, soundings were also analyzed upward from 1784 m, in 200 m altitude
increments, to develop a set of coefficients, and a variable coefficient expression, that
can be applied to the mobile radiometer data to account for significant changes in
altitude. The results for mean radiating temperatures at 20.6 and 31.65 GHz, and vapor
coefficients CV1, CV2 and CV3 are shown in Fig. 2. Except for CV3 the parameters have
a good linear trend when plotted versus altitude. Although two outlying points disrupt
the otherwise linear trend for CV3, the overall variation in CV3 may not be sufficient to
significantly change liquid or vapor depth values. Sensitivity of liquid and vapor to
changes in CV3 will be tested.

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