Citation Flight Notes July 21, 2002 Crew: Le Hardy, Sprosty, Poellot, Twohy, DeMott 183500 Engine start 184550 Level 18,000' for ATC. There is a cell between West site and Ft. Meyers. 184840 Adjusting CN flow up from .25 to .70 F RSW 177/047 G RSW 244/018 185415 Cleared to F, FL250. Under the high flyers. 185545 Photo of cell of interest 190112 F. Very close to anvil base. Base is lower to right (090), closer to storm cell. 190310 In cloud. All probes working. Large aggregates. 190710 Balancing EG&G dewpoint. 191137 Back in some cloud. 191410 Reversing, starting climb to FL270 191640 G, GL270, heading 150. Will do a spiral up along the line 192000 Standing by clearance for spiral 102056 In occasional aggregates, FL270 192250 CPI small crystals look clear, large ones out of focus. 192330 Starting spiral climb. 192740 CPI somewhat better now. 192850 No optical effects around sun. Particle habits tough to determine on CPI. 193400 Climbing through 32,400', WB is high, to the southwest. 193425 Under WB contrail. Water contents are low today (CVI), <0.2 193635 Light turbulence. 193720 Top at FL340. 194000 FL350, in cloud. J 180/026 K 200/054 194240 A couple of 100 micron plates. In and out of cloud. Proceeding to J, FL350 194530 J 195000 Heading to K. 195640 K, FL350, in cloud 195910 Larger aggregates, chain aggregates. 200000 K-J, FL350, almost out of cloud. 200650 Getting into cloud. Will pass under WB and Proteus opposite heading. 200758 Under WB. 200850 J, turn 201350 Photo of WB contrail, Proteus. FL330, heading 220, waiting for lower, going to K 201630 In cloud, more dense. 201900 Descending. Larger particles, optically thin, near K. 202000 Turn and reverse 202150 In turn, chain aggregates, level FL310, near base. 202555 Cloud getting a little thicker 202700 Out of cloud, some more ahead. Heading 040 202925 In thin cloud, subsaturated air. 203220 J 203645 J, heading 220, FL310, still waiting for ATC clearance. 203838 Close to under WB, opposite heading (Proteus, too). Light turbulence 204020 In between cirrus patches. 204400 K, turning. NPOL is moving us - 5 mile offset to the southeast. 204810 Finally climbing. 204920 FL320 205210 (approximately) Under WB, Proteus ahead. We seem to be slightly offset to the northwest from other aircraft. 205400 Not in cloud N 175/028 O 197/056 205625 Out of cloud, O. Climb to FL330. 205755 In cloud. 205910 Back out, FL330. 210000 N-O, FL330. Cirrus is layered and patchy, thinning. 210440 Commercial aircraft crossing above, contrail. 210625 Extend line P 204/77 210720 Back into cloud. Halo. Fuzzy plates (all CPI images are fuzzy). Cirrus is optically thin. FL330 211220 Photo of towering cumulus below. No halo now, near P. Q 195/47 211730 FL350, P-Q. In some cloud. High CN counts today. New cell about 50 miles east. 212450 Near Q. Unable to get FL370. 212910 Q-P, in clear. CFDC sample T = -34C. 213030 Turning onto track. We offset 2 miles to get more under WB and Proteus. FL350 R 183/055 S 173/115 214200 Climbing 215955 R. Going to S, FL390. 220315 Lost inverter #3. 220530 Inverter #3 back. Not approved for intercomparison, WB at FL410 220735 All probes working. Some plates. Large range of particle sizes, to > 1 mm. 221400 End leg. RTB. 224852 Land 4.2 hours Summary: 1. Flew at anvil base in subsaturated air. FL250, 270. 2. Spiral climb from FL270-350. Water contents fairly low. 3. Set up on southwest-northeast track with other aircraft. FL350, 330, 310, 320, 330(2), 350(3). Cloud thinned and became patchy. Saw a mix of particle sizes. 4. Set up intercomparison leg, FL390. Large range of particle sizes. Instrument Issues: Many CPI images were fuzzy. The smaller ones were clearer than the larger ones. Did lose inverter #3 for a couple of minutes