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Last modified
7/28/2009 2:38:32 PM
Creation date
4/16/2008 11:09:26 AM
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Template:
Weather Modification
Contract/Permit #
1-07-81-V0175
Title
State of Montana Activities in the High Plains Cooperative Program: 1981-1983
Date
6/30/1983
State
MT
Weather Modification - Doc Type
Report
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<br />were addressed in the analysis. In spite of this, eleven to fourteen CC's were <br />found which lived entirely over the mesonet, far more than expected. <br /> <br />The predictor covariates were limited to kinematic and moisture <br />convergence. Programs developed by Reclam~tion and DNRC personnel (Politte and <br />Engel, 1982) were used to provide contoured fields of these covariates for any <br />specified merging time. These were related to CC's derived from SWR-75 radar <br />data. Radar derived CC characteristics include rain production, rain area, <br />first and last echo, and first rainfall estimate. <br /> <br />b. Post Field Season Data Analysis <br /> <br />1. Mesonet Data <br /> <br />This section describes the analysis of the PROBE data after they have been <br />archived. The reader is referred to Section D for a description of data <br />transfer from the PROBE stations to the downlink in Denver. A majority of the <br />analysis software was developed on Reclamation's CYBER. Later, the softwal:e <br />was implemented on the Perkin-Elmer (PE) 3220 as this was more convenient ~LDd <br />economical. All of the post-I98I field season analysis of PROBE data has been <br />done on the PE 3220. A description of this software as well as details on data <br />access are given by Politte and Engel (1982). <br /> <br />To date the NCAR PAM data had not been merged with the PROBE data. Since <br />DNRC did not have the resources to do this, the analysis was based solely ()n <br />PROBE. <br /> <br />The PROBE data archived in Denver are in raw binary files plus a <br />calibration file. From these, files of engineering units were made on a GlIT <br />day basis. These files were transferred to the Miles City PE 3220 using the <br />CYBER UT 200 machine-to-machine cormnunications system and stored on magnetic <br />tape. Access of data was made more efficient by archiving in binary randoln <br />access files, therefore the contiguous access fields were also stored on <br />magnetic tape at Miles City. Post season editing of the data required the <br />generation of a recalibration file which remains in the PE 3220 system. This <br />file adjusts engineering units or "turns off" parameters; i.e., indicates <br />certain data to be missing according to the requirements discussed later. <br /> <br />Most of the final PROBE data processing products have been derived froln the <br />SFCANL software or slight modifications of this package. This package <br />objectively analyzes, plots, and contours measured and derived fields of the <br />quantities listed in Table 11.9. <br /> <br />Table 11.9 <br /> <br />1. Battery voltage (Volts) <br />2. Pressure (kPa) <br />3. Temperature (deg C) <br />4. Relative humiditr (%) <br />5. U-speed (m see - ) <br />6. V-speed (m see -1) <br />7. Precipitation (mm) <br />8. Solar radiance (watt/m2) <br />9. Streamlines. <br />10. Isotaes (m see -1) <br />11. Pressure change (kPa) <br />12. Divergence (E-4 see-I) <br /> <br />Quantities Analyzed by SFCANL <br /> <br />13. Moisture divergence (E-6 see-I) <br />14. Dew point (deg C) <br />15. Dew point depression (deg C) <br />16. Relative vorticity (E-4 see-I) <br />17. Virtual temperature elevation (d,~g C) <br />18. Streamlines less mean wind <br />19. Potential temperature (deg k) <br />20. Equivalent potential temperature (K) <br />21. Mixing ratio (grams kg-I) <br />22. Station model (T. TD. p) <br />23. Station model (9. W. ge) <br />24. Radar reflectivities (require dB:~ file) <br /> <br />28 <br />
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