Laserfiche WebLink
<br />I <br /> <br />I <br /> <br />dllZ, ~ 45249 t 20Ioglr). P" + P, .1.7, <br /> <br />I <br />I <br />I <br />I <br />I <br /> <br />where the: lirst term is the radar constant. r is the slant range distance to the center of a range gale <br />in meters, p., is the average transmitled power, P, is the returned rxm:cr in dBM (from Fig J), and <br />1.7 is a correction for waveguide and coupler loss. In the radar constant ice scattcrcrs were assumed <br />\\:ilh a :K!2 value of 0.176. It is important to note that the 1\\'0 1994 calibrations produced <br />sigmficantly dIfferent curves, with the later one offset by about 5 d8M from the earlier one. <br />Obvioll'\ly the receiver characteristics changed Ixtwccn the two dates. hut it IS not kno\lm when the <br />change occurred The data ''''cre processed using the calibration that occurred closer in time. In the <br />occurrence of storms in 1994, there was a dry period from I 0 February I Q94 through 17 February <br />1994, y,;lh several storms occurring between 18 and 22 February. Th~ 23 FcbruaT)' calibration was <br />used for all these later storms, and seems appropriat~ in light of the closeness in time. <br /> <br />I <br />I <br /> <br /> 1994 NOAAlUtah Project <br /> .10 <br /> -11- 111B1i4 C-'l>rlllon <br /> .20 <br /> .A 2/23I94c.bation'1 <br /> -30 <br /> -+- 212:w4 Calbfltion-12 <br /> ... <br />- 50 <br />E <br />'" <br />~ <br />" ... <br />. <br />~ <br />"- <br />:. .70 <br />> <br />~ ... <br />'" <br /> ... <br /> .'00 <br /> -110 ,,,1,,,,1 <br /> , 25 50 " .00 125 '50 115 200 225 25' <br /> DIgital Counts <br /> <br /> <br />I <br /> <br />I <br /> <br />I <br />I <br />I <br />I <br />I <br /> <br />I <br />I <br />I <br /> <br />Figure 3. CalthratJOn.\ fi)r the 1'1I'OAA-Utah K"hwld radar from rccelver data collected O!l /8 <br />January and 23 Fehruary /994. Curves are fourth order po/ynomw/ fits to the data pO/nH. <br /> <br />8 <br />