sequences files observation 87 328 11-24-87 10:52 - 12:31 3 9 Clear 87 334 11-30-87 12:22 - 15:08 6 18 Smog 87 335 12-01 87 08:40 - 11:51 5 17 Smog 88 013 01-13-88 10:00 - 10:48 2 9 Cirrus/contrails 88 020 01-20-88 09:55 - 15:44 8 24 Light smog to clear 88 026 01-26-88 09:16 - 14:45 9 33 Light-to-mod smog 88 047 02-16-88 09:20 - 09:46 2 7 Cirrus; snow 88 048 02-17-88 10:12 - 15:48 9 33 Light-to-mod smog 88 055 02-24-88 08:05 - 10:21 4 15 Cirrus 88 056 02-25-88 07:52 - 12:20 7 20 Heavy smog AM; clear noon 88 057 02-26-88 08:17 - 12:16 11 34 SRRL clear; " " Denver ---- ---- 66 219 N SERI87328 27 11 24 87 328 158 1050: Breezy; no brown cloud visible; hazy "white" to south and west; Mountains just visible Excellent atmospheric stability Temp controller at 40 C 1108: 1120: Temp controller at 40 C 1123: 1149: 1201: 1222: 1224: 1226: Slides for all spectra except diffuse ------ 87 328 A: 1052 DN by itself 87 328 B: 1111 DN C: 1122 GH D: 1125 DF 87 328 E: 1151 DN F: GH missing G: 1202 DF missing one data point; added -99 to end of scan 87 328 H: 1227 DN I: 1230 GH J: 1231 DF N SERI87334 46 11 30 87 334 158 1219: Snow on ground and hill to west (increased global) 1224: 1229: 1/10 Cs cloud cover on south horizon; power plant cooling tower plume at about 5 deg elevation 1252: Contrails do not persist 1258: Temp controller 40 C 1258+: 1321: Power plant plume (light) building below sun above water vapor plume/cloud 1/10 Cs cloud cover on south horizon 1325: 1326: 1410: Temp controller 40 C 1414: 1416: 1436: 1438: 1441: 1504: 1506: 1509: Sun below power line for series of three scans Slides for all spectra, including diffuse ------ 87 334 A: 1222 DN B: 1227 GH C: 1229 DF shade disk slides (2 ea) 18 & 19 (have only 3) 87 334 D: 1254 DN E: 1258 GH F: 1259 DF 87 334 G: 1321 DN H: 1324 GH I: 1326 DF slides 23 & 24 with wand; camera switched to auto on #23 87 334 J: 1410 DN K: 1413 GH L: 1414 DF 87 334 M: 1435 DN N: 1438 GH O: 1440 DF 87 334 P: 1503 DN Q: 1506 GH R: 1508 DF missing one data point; added -99 to end of scan picture #33 missing N SERI87335 40 12 01 87 335 158 0840: Power plant cooling tower clouds obscure bank building downtown Temp controller at 40 C 0840: Power plant cooling tower clouds obscure bank building downtown Temp controller at 40 C 0911: Power plant plume visible below sun and to west Winds increasing to 4-6 m/s Temp controller 39 C; set point 40 C (after diffuse spectrum) 0942: Contrails do not persist Sun in power plant cloud (band) but drops to west Temp controller at 40 C 1014: 1-2/10 As cloud cover building to west Temp controller at 40 C 1113: Smelled sulfur, possibly from refineries Temp controller at 40 C (small amount of noise in near-IR on diffuse spectrum at 1117 1150: Clouds dissipating; <<1/10 to west; contrails lasting longer Winds aloft chopping out sections (wave form) Temp controller 40-41 C on direct spectrum Slides for all spectra, including diffuse ------ 87 335 A: 0840 DN B: 0845 GH C: 0847 DF 87 335 D: 0911 DN E: 0913 GH 15 mV drift F: 0916 DF 87 335 G: 0941 DN H: 0944 GH I: 0946 DF 87 335 J: 1013 DN K: 1016 GH mV drift L: 1019 DF 3 mV drift 87 335 M: 1113 DN N: 1115 GH O: 1117 DF 27 mV drift on O or P P: 1119 DF 2 diffuse 87 335 Q: 1151 DN 18 mV drift; one spectrum - memory full N SERI88013 20 01 13 88 013 158 1000: Contrails above and below sun (+/- 10 deg); now thin cirrus Temp controller 39 C for global spectrum 1050: 1/10 total cloud cover Cs and lenticular cloud cover west of sun Contrails persisting (lenticular west to northwest) Temp controller at 40 C Slides for all spectra, including diffuse ------ 88 013 A: 1000 DN 29 mV drift B: 1001 DN 38 mV drift (so continued) C: 1010 GH D: 1012 DF 100 cm distance E: 1014 DF 200 cm distance 88 013 F: 1035 GH left level bubble near sphere dome; so repeat with G G: 1037 GH see F H: 1038 DF I: 1048 DN N SERI88020 45 01 20 88 020 158 0953: Temp controller at 40 C Fresh snow yesterday (4" new on 6" base) 1017: No clouds or contrails Power plant plume OK 1051: Very light pollution and clearing out 1129: 1206: Clear sky pollution slightly darker north Temp controller at 40 C 1315: Winds dimishing to light and variable Sky is clear; no contrails Snow cover 4" new + 6" old; drifts to 24" Temp controller 40 C 1507: Winds increasing brown cloud to south-southeast (pushing) Temp controller 39 C for GH and Diffuse; 40 C for Direct 1538: Contrails a little longer (10 deg angle) Clear sky brown cloud "packing" to south-southeast Slides for all spectra, including diffuse ------ 88 020 A: 0955 DN B: 1000 GH C: 1002 DF 88 020 D: 1015 GH E: 1017 DF F: 1023 DN 88 020 G: 1051 DN H: 1055 GH I: 1056 DF 88 020 J: 1124 GH K: 1129 DF L: 1135 DN 88 020 M: 1206 DN solar noon sequence N: 1210 GH O: 1211 DF 88 020 P: 1315 GH Q: 1316 DF R: 1322 DN 88 020 S: 1507 GH T: 1510 DF U: 1513 DN 88 020 V: 1538 DN W: 1542 GH X: 1544 DF N SERI88026 64 01 26 88 026 158 0916: Moderate brown cloud; no clouds Contrails not persisting Temp controller 40 C for DN; 39 C for GH; 41 C for DIF 0945: Temp controller 40 C Contrails across sun for diffuse with dome at 0957; none for diffuse spectrum at 0958 1010: Winds shifted 180 (now out of west); power plant plume now across bank buliding downtown Contrails persisting; but linger near east Temp controller 40 C 1043: Snow cover 85-90 percent; 1 to 10" drifts Power plant plume heading east 1/3 distance between horizon and sun (white color) Contrails now dissipating 1121: Temp controller at 40 C 1204: Clouds developing to west and southwest; < 1/10 As in linear bands parallel to mountains Contrails persist depending on altitude of aircraft Temp controller at 40 C 1241: Winds decreasing and now out of south-southeast Temp controller at 40 C 1401: Temp controller at 40 C 1438: Wind has blown cloud to mountains Power plant plume rises to below sun Still < 1/10 As to west and southwest (lenticular) Temp controller 40 C Slides for all spectra, including diffuse ------ 88 026 A: 0916 DN B: 0921 GH C: 0922 DF 88 026 D: 0945 GH E: 0947 DF F: 0952 DN G: 0957 GH GH with Teflon dome; contrail across sun H: 0958 GH GH with Teflon dome; no contrail 88 026 I: 1010 DN J: 1013 GH K: 1014 DF 88 026 L: 1043 GH M: 1045 DF N: 1049 DN 88 026 O: 1121 DN P: 1125 GH Q: 1127 DF 88 026 R: 1204 GH S: 1206 DF odd plot - probably bad spectrum T: 1209 DN U: 1217 GH GH with Teflon dome V: 1218 DF DF with Teflon dome 88 026 W: 1241 DN X: 1245 GH Y: 1246 DF Z: 1252 GH GH with Teflon dome AA: 1253 DF DF with Teflon dome 88 026 BB: 1401 DN CC: 1409 GH DD: 1410 DF 88 026 EE: 1438 DN 23 mV drift FF: 1443 GH GG: 1445 DF N SERI88047 19 02 16 88 047 158 0920: Ac to west; some thin overhead clouds No snow cover Temp controller 40 C 0938: Clouds increasing from west (snowing); cloud developing rapidly from northwest; snow began about 1230 No pollution to east; building up to west Temp controller 39 C on GH spectrum; set point 41 C Slides for all spectra, including diffuse ------ 88 047 A: 0920 DN 38 mV drift B: 0922 DN no drift C: 0927 GH D: 0930 DF 88 047 E: 0938 GH F: 0940 DF G: 0946 DN N SERI88048 61 02 17 88 048 158 1012: Light-moderate brown cloud all quads; contrails do not persist Very clear sky after last night 3-4" snow Power plant plume blowing a little out of south; haze/smoke overhead and in sun path second DN spectrum 1039: Few Cu clouds on south horizon Temp controller 39-40 1120: Winds picking up Temp controller 40 C 1149: Ac increasing on southern horizon (very low); front of bank building Temp controller 40 C 1215: Temp controller 40 C 1255: 1326: Power plant plume visible below sun and drifting west-northwest and up toward solar disk Temp controller 40 C (adjusted from 40 C) 1437: Temp controller 40 C Clouds are gone 1504: Power plant plume drifting west and passing by sun Temp controller 40 C 1543: Temp controller 40 C Slides for all spectra, including diffuse ------ 88 048 A: 1012 DN 28 mV drift B: 1014 DN 21 mV drift, so continued C: 1017 GH D: 1019 DF 88 048 E: 1039 GH F: 1041 DF G: 1048 DF DF with Teflon dome H: 1050 DN 31 mV drift 88 048 I: 1119 DN J: 1123 GH K: 1125 DF 88 048 L: 1148 GH M: 1149 DF N: 1153 DN O: was circumsolar - deleted P: 1158 DF DF with Teflon dome 88 048 Q: 1214 DN R: 1219 GH S: 1221 DF 88 048 T: 1248 GH U: 1250 DF V: 1254 DN 88 048 W: 1325 DN 7 mV drift X: 1331 GH Y: 1333 DF 88 048 Z: 1436 GH AA: 1439 DF BB: 1444 DN 88 048 CC: 1503 DN plume drifting past sun DD: 1507 GH 40 mV drift EE: 1511 DF 88 048 FF: 1542 GH GG: 1544 DF HH: 1548 DN N SERI88055 32 02 24 88 055 158 0803: Contrails persist; 5-6/10 thin Ci clouds Power plant plume drifting east Temp controller 39 C Temp controller 40 C on next spectrum GH spectrum at 0811 looks odd 0821: Temp controller 39 C on GH spectrum; 41 C on DN spectrum 0845: Temp controller 40 C 0914: Temp controller 39-40 C 1012: Power plant plume now vertical; winds shifted to 90 deg east at 1 m/s Contrails persisting across sky Slides for spectra beginning at about 1000, including diffuse ------ 88 055 A: 0805 DN Cirrus B: 0811 GH 27 mV drift; noisy spectrum; cirrus C: 0813 DF Cirrus 88 055 D: 0823 GH Cirrus E: 0825 DF Cirrus F: 0829 DN Cirrus 88 055 G: 0847 DN 23 mV drift; Cirrus H: 0851 GH Cirrus I: 0853 DF Cirrus 88 055 J: 0904 GH Cirrus K: 0906 DF Cirrus L: 0911 DN Cirrus 88 055 M: 1015 DN 17 mV drift; Cirrus N: 1019 GH Cirrus O: 1021 DF Cirrus P: was circumsolar N SERI88056 38 02 25 88 056 158 0750: Cirrus (contrails to south-southwest) Light brown cloud blowing east since sunrise Temp controller 40 C 0811: Power plant plume visible from north-northeast through stack; layer at height of top of power line 0843: No snow cover 0927: Wave clouds to west, increasing north/south 1000: Wave clouds building to west 1110: Very light brown cloud; winds have blown most of it to north Cs wave clouds dissipating to west; very thin Cs to south and north (low on horizon) 1214: Wave clouds gone; thin band of Cs (contrail) above bank skyline Slides for all spectra, including diffuse ------ 88 056 A: 0752 DN B: 0755 GH 4 mV drift C: 0802 DF 52 mV drift 88 056 D: 0816 GH E: 0817 DF F: 0820 DN 88 056 G: 0846 DN 33 mV drift H: 0850 GH I: 0852 DF 88 056 J: 0930 DN 32 mV drift K: 0935 GH L: 0937 DF 88 056 M: 1005 GH N: 1006 DF O: 1010 DN 88 056 P: 1116 DN Q: 1120 GH R: 1122 DF 88 056 S: GH missing; could generate from DN and DF T: 1217 DF U: 1220 DN N SERI88057 53 02 26 88 057 158 0815: 0832: Noise in near-IR in GH spectrum at 0827 0834: Very clear sky; contrails short 0846: Denver brown cloud moderate; height 60% of buildings 0855: 0920: Winds may shift out of north 0948: Denver brown cloud darker brown; height to 100% of buildings Temp controller 40 C 1017: Wind direction varies between 90-180 deg DIF spectrum very noisy at 1021 1055: Temp controller 40 C 1120: No brown cloud in Denver near-IR slightly noisy in DIF spectrum at 1123 1210: Temp controller 40 C Slides for all spectra, including diffuse 88 057 A: 0817 DN B: 0820 GH C: 0822 DF 88 057 D: 0827 GH 9 mV drift; spectrum noisy in near-IR E: 0828 DF F: 0832 DN 88 057 G: 0835 DN 14 mV drift H: 0839 GH I: 0840 DF 88 057 J: 0847 GH K: 0849 DF L: 0852 DN 88 057 M: 0857 DN N: 0859 DF DF with Teflon dome O: 0901 DF P: 0903 GH 88 057 Q: 0920 GH missing 7-8 data points; added -99s at end of scan R: 0923 DF S: 0926 DN 88 057 T: 0949 DN U: 0951 GH V: 0953 DF 88 057 W: 1020 GH 14 mV drift; spectrum noisy in near-IR X: 1021 DF 17 mV drift; spectrum very noisy Y: 1024 DN 6 mV drift 88 057 Z: 1050 DN AA: 1053 GH BB: 1054 DF 88 057 CC: 1120 GH some noise in near-IR DD: 1123 DF spectrum very noisy in near-IR EE: 1125 DN 88 057 FF: 1212 DN GG: 1214 GH HH: 1216 DF