Progressive Science Missions

• Overview of resources• Schedule• Data logging and

communication• Individual flight plans• Joint flight plans

Agenda:

Overview of resources• New Particle Formation Denver U.- Kent State 32 hours

• DOCIMS – SrCu MMM-UCLA 27 hours / 19 sondes

• START – UTLS NCAR- UTLS 48 hours / 28 sondes

• Static pressure defect UC-Irwine 18 hours

• CHAPS – HIAPER NCAR-RAF 39 hours / 6

sondes

• TOTAL 164 hours / 53 sondes

• November – December 150 hours

• January 14 hours

• TOTAL FLIGHT DAYS

• November – December 25 days

• Flight hours per day (average) 6 hours

• Assuming 9-hours per flight, then fly 2/3 of all days (more than 3 days/week)

• Double crew etc. - Even so, we may not be able to fly all hours.

Schedule and Issues (1)

• 14 Sep – 30 Sep Infrastructure test

flights

14 Sep – 30 Sep Infrastructure test flights, 2 weeksData system, state parameters, turbulence

systemStructural and electrical analysisIcing 'certification' of air intakes

3 Oct – 18 Nov Upload:Dropsonde cabling, cabin to baggage

compartmentTrailing cone tubing, cabin to boiler room

(21 days)HIAPER maintenance + other smaller

tasksLoad aft racks firstInstall air intakes and H2OCertify

IF DONE EARLY, THEN MOVE SCHEDULE UP (unlikely)

Schedule and Issues (2)

• 14 Sep – 30 Sep Infrastructure test

flights

21 Nov – 23 Dec Main flight period, 5 weeks, 150 hours

27 Dec – 1 Jan No flights

2 Jan – 6 Jan Upload:Install trailing cone in tail deck

9 Jan – 13 Jan Fly trailing cone:1 local flight1 Pacific flight (surface to max altitude)

16 Jan – 28 Feb T-Rex upload

1 Mar – 30 Apr T-Rex flight

1 May – onwards HIAPER infrastructure upgrade period

EMERGENCY EXITS

EMERGENCY EXITS

PU LL

0 220PU LL

20202002

PU LL

0 220PU LL

20202002

R1 R2 R3 R4 R5 R6

L1 L2 L3 L4 L5 L6P9 P11

P10 P12

GV SN 677 CABIN INTERIOR CONFIGURATION

ADS

LaptopInlet heatersCampos H2ORake P-stat and P-diffRack temperatureCabin pressureTrailing cone P-diffNOAA ozoneDifferential GPS

DU FCASSDU NMASS

Aerosol rack:CN + RDMA, laptop

Dropsonde rack

>>

RAF CO, CO2, laptop

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HIAPER satcom capabilities

• We will be working on this during progressive science (was not part of a/c delivery)

• Plan to have IRC chat available• We will be attempting ground data xfer• Sftp/scp up also a possibility• Use of satcom constrained by budget:

2Mbytes/hour

Distribution of flight time – What are the rules

Everybody have their own objectives – ours is to provide the best possible measurements to you.

That means: On some of 'your' flights, we will have to add a bit extra time to do basic aircraft characterization. We will pay for that, but otherwise the projects will pay for ferry time etc.

Characterization of HIAPER in Progressive Science (CHAPS)

• CHAPS request through OFAP/NSF to provide familiarization and

characterization of HIAPER systems.– Flight Crew weather familiarization (Boynton)– Dropsonde check out (Jensen, RTF staff)– State Parameter Calibration and Characterization (Jensen,

Schanot)– Performance testing of inlets and exhaust system (Romashkin,

Campos, Rogers). – Testing of Aerosol and Trace Gas instruments (Rogers,

Campos, Romashkin)– Cabin leak testing and boundary layer characterization (Rogers,

Campos)• Priorities, Stith, PI

Weather Familiarization

• Simulated T-Rex mission in mountain

wave turbulence

• High altitude convective turbulence

• Sampling of modest convective cloud (e.g.

smaller than thunderstorm, such as a Cu

congestus)

Switch to Schanot word document

Trailing conePurpose: To compare aircraft static pressure measurements from the fuselage holes to the static pressure measured 150 ft behind the aircraft in 'un-disturbed' air.

Tap into static system, insert a differential pressure transducer between static system and trailing cone static tube.

Height of trailing cone does not matterMove the aircraft into the experimental category

Fly one flight (4 hours over Colorado) to test system – ground station in eastern Colorado

Fly one flight over the Pacific (surface to 40 kft), within 100 km of ground station on the beach. Lever flight legs at different speeds.

Differential GPS

• Purpose: To characterize the quality of static pressure measurements from HIAPER

• One unit on HIAPER, one on the ground. Novatel OEM4 L1/L2. Typical accuracy 10-25 cm in vertical and horizontal.

• Use ground station (GPS, p-stat, T) to predict the static pressure at the flight level:

• Low-level legs in mixed-layer at different airspeeds (absolute static pressure comparison)

• High-and low-level legs to give static error as a function of attitude angles (mainly pitch variations due to airspeed variations)

• Use hypsometric (hydrostatic equation)

Switch to Dave Rogers powerpointSwitch to Teresa Campos word document

Gulfstream V Test Flights: Static Pressure Correction andand Boundary-Layer Thickness

Carl A. FrieheUC Irvine

Purpose: To determine the static pressure defect on the GV viaan extensible Pitot-static tube, which will also provide the boundary-layer profile. This has been subsumed into theRAF Pitot rake project.

Requirement: The Pitot-static should be away from the fuselagein the free-stream flow. The flow distortion by the RAF Pitot rake must be minimized.

Required Measurements: The dynamic and static pressures fromthe Pitot-static tube. Whether the static pressure is also plumbed to a differential transducer with the research static is up to RAF.

Flight Profile: The data are to be recorded continuously at 10 Hz minimum. Straight and level runs of at least 2 min at variousaltitudes are required, and are probably exactly compatible withother requirements. Measurements at altitudes lower than Boulderare required, down to near sea level.

Drizzle and Open Cells in Marine Stratocumulus – DOCIMS

Don Lenschow and Bjorn Stevens, Co-Investigators

We plan to study the relationship between pockets of open cells (POCs) and drizzle

• Does drizzle help maintain an open-cell structure in MS?

• Is drizzle associated with the presence of elevated moist layers?

Objectives:• Study the thermodynamic and dynamic structure of an open-

cell MS region• Compare with an adjacent uniform MS region• Use observations as basis for LES of MS

Pockets of Cells (POCs): Are they caused by drizzle? (Stevens et al., BAMS, 2004)

Channel 1 GOES-10 reflectance at 0730 LT11 Jul 02.

Zoomed image from photo at right with flightsegment overlaid.

Time-height radar reflec-tivities from RF-02 DYCOMS C-130 flight.White line is SABL lidarestimate of cloud top.

Vertical structure of the boundary layer

Stevens et al., BAMS, 84 (2003)

Airplane soundings from RF01. The red circles are from eight 30 min circles in the PBL and two above the PBL.. From right to left: Total water mixing ratio; liquid water potential temperature; and liquid water mixing ratio. Gray shaded area is the cloud layer; zi is PBL depth; and h is cloud thickness.

Bjorn Stevens web page:

www.atmos.ucla..edu/~bstevens/docims/docims.html