This dataset includes preliminary radar reflectivity product measured by the NASA Goddard Space Flight Center ER-2 Doppler Radar (EDOP) and Cloud Radar System (CRS) during the CRYSTAL-FACE field campaign. Data format follows the specifications from NASA data archive center (FFI=2310, Version 1.3). The detailed information can be found at: http://espoarchive.nasa.gov/archive/scratch/2005/formatspec.txt and at: http://espoarchive.nasa.gov/archive/forspec.html. 1. EDOP: file name : ED0207xx_xxxx__REF.ER2 (reflectivity) ED0207xx_xxxx__VEL.ER2 (velocity) data product : calibrated radar reflectivity. Calibration accuracy is 2 dB or Doppler velocity time interval: 5 second. 2. CRS: file name : CR0207xx_xxxx__REF.ER2 (reflectivity) CR0207xx_xxxx__VEL.ER2 (velocity) data product : calibrated, water vapor and oxygen attenuation corrected radar reflectivity Preliminary calibration accuracy is 2dB, or Doppler velocity. average : data was averaged using floating window of 2 second in time domain and 150 meters in range. time interval: 5 second. 3. Note: -- For each time mark, there is a header line which contains (1) to (9) variables listed below. Following the header is the reflectivity data block. -- Reflectivity scale factor is 0.1. -- Data starts from range near the aircraft to the surface. So the altitude for gate number N should be: (range of first gate) - N * (Altitude increment) -- CRS data noise floor was not threshold. -- The high peak signal at far range is surface return, any significant signal beyond that range is mirror image return. In most EDOP data, there is a thin line at the near range (about 14-15 km altitude above the surface). It is the second trip relfection of the surface. -- There are strip lines in some EDOP files, these are the interference from instruments on P3 aircarft. 4. Data Block Structure (1) (2) (3) (4) (5) (6) (7) (8) (9) --------------------------------------------------------------------- 62570 550 18402 75 17 22 51 -7968 2549 <-- header -1209 -1207 -499 -1204 -1203 -1201 -1200 -1198 -1197 -1196 \ -1194 -402 -1192 -371 -1189 -1188 -364 -1185 -1184 -433 | -1182 -357 -417 -1178 -319 -403 -1175 -1174 -1173 -1172 | -1171 -361 -334 -327 -1167 -1166 -1165 -339 -367 -318 | -390 -312 -1159 -340 -337 -1157 -1156 -527 -328 -1153 \ data -1153 -1152 -1151 -329 -1149 -1149 -319 -1147 -1146 -367 / block -324 -371 -302 -346 -1142 -335 -432 -1140 -312 -307 | -1137 -328 -1136 -344 -349 -1134 -277 -1133 -308 -1131 | -304 -351 -1129 -1129 -315 -1128 -1127 -423 -451 -1122 | -1125 -1124 -261 -367 -1122 -291 -1121 -1120 -1120 -1119 | ...... | ...... | ...... / ---------------------------------------------------------------------- (1) UTC time in seconds of the day (2) Number of altitudes for current time mark (3) Geometric altitude (m) at which data begins (4) Altitude increment (m), scale factor = 1.0 (5) UTC Hour (6) UTC Minutes (7) UTC Seconds (8) Longitude (degree), scale factor = 0.01. (9) Latitude (degree), scale factor = 0.01. 5. Contact information: Gerry Heymsfield NASA GSFC Code 912 Bldg. 33, Room A405 Tel: (301)614-6369 Email: heymsfield@agnes.gsfc.nasa.gov Lihua Li NASA GSFC Code 912 Bldg. 33, Room C426 Tel: (301)614-6356 Email: lihua@agnes.gsfc.nasa.gov Lin Tian NASA GSFC Code 912 Bldg. 33, Room C416 Tel: (301)614-6318 Email: tian@agnes.gsfc.nasa.gov