{return}
April 29, 1998
Crew: Streibel, Miller, Arnott, Poellot
1505 Getting ready for engine start
211845 Holding for takeoff. Planned stratus sampling mission
212336 Takeoff
212500 In and out of cloud fragments going through 860m pressure altitude.
212625 Level, in cloud, ground contact, LWC 0.07 max. FSSP 50-100 /cc
212700 Out of cloud. Note: ozone values seem low.
212945 Adjusting LiCor zero to 4.20 to match EG&G. It was reading warmer than air temp.
Cryo reading on display 2., on M200 5.8, EGG 5.3. Rev flow temps displayed are low, but not calibrated.
Lining up for tracks, level legs, NW-SE.
In clear over CART at 3000'. Cloud base variable, lower scattered layer.
213705 Lined up SE-bound over CART, 5 miles out, just came out of cloud at 3500'. Level.
213844 CART, 3500', in cloud. Occasional light turbulence in cloud.
214310 4000'. LWC 0.35-0.37 g/m3.
214430 CART, 4000', LWC dropping off as we came over CART.
215002 CART, 4500', in cloud, LWC about 0.5 g/m3 and climbing.
215200 A few 2dc images. 1dp is counting up to channels 4 and 5. 1dc spectrum looks funny, very flat.
215340 IAS cockpit 154, displayed 152, using pitot nose.
215500 Heading toward CART, northwest bound at 5000'.
215635 CART, 5000', LWC up to 0.5 g/m3. Variable along leg from 0.2 0.6.
215920 5500'. Seeing drops (2d) up to 200 um diameter.
220218 CART, 5500', 1649 m pressure altitude. LWC 0.4 0.6 g/m3, temp = 0.7 C.
220335 (approx.) On top at 5900'. Altimeter setting is 30.05. LiCor dew point has gone higher than EG&G and cryo.
220740 In and out of cloud tops at 6000'. I believe we'll be doing a ramp down next.
220756 CART
221055 Started slow ramp descent.
221210 Pretty good sized drops on 2dc, 200-250 um. King LWC 0.3-0.4 g/m3.
Went by CART a little before 2214.
221630 Turning around, not yet at cloud base, descending through 4000'.
221808 Cloud base, 3300', 965 m MSL.
222025 CART, through 4500', LWC 0.4-0.5, increasing.
222647 CART, starting spiral descent from 6000'.
223823 CART, 4000', not in cloud.
224420 Drizzle drops on 2dc to 250 um or so.
224437 CART, 4500', just came out of cloud.
225020 CART, 5000', 1494 m pressure altitude, LWC 0.15 g/m3.
225624 CART, 5500', in cloud, LWC 0.2 g/m3, sort of at a minimum for this leg over CART.
230000 Going to do a turbulence run 30 nm leg outbound at 6000'.
Getting clearance. 6000' is close to cloud top, in and out of tops.
230210 CART, 6000', just above top.
230655 Lined up heading NW at 6000' for 30 nm leg, into wind. Wind is 305/16 kts.
230926 CART, 6000', heading 300 wind is 300/12.
231220 LWC = 1.0 g/m3, 6000'.
2321 (approx.) Reached end point at NW, descending to 4000' for return leg.
232349 30 miles NW of CART, inbound at 4000'.
232730 Actually in and out of base at 4000'.
232750 Will climb to 4500'; starting climb 18 miles from CART.
Searching to be on top of a low scattered layer, under the overcast. If there are two layers, they are nearly merged here.
233115 Looks like we are in between layers 8 miles from CART, 4500', 1345 m pressure altitude, altimeter setting 30.04.
233235 Very light turbulence.
233401 CART, 4500', will start a spiral up. LWC 0.3-0.4 g/m3.
Correction will drop to cloud base before we start to spiral up.
234000 Level at 6000', waiting for amended clearance for higher. LWC as high as 0.8 g/m3.
234035 On top at 6300' (in between layers higher overcast).
234114 (approx.) Started spiral down.
234338 3500', at base.
234600 Heading home.
235503 Landing
2.5 hours flight time.