Jetstream 31 (J31) in INTEX-B/MILAGRO: Science Goals, Payload, Required Flight Patterns, and Status Phil Russell, Lead PI Instrument PIs: Jens Redemann, Brian Cairns, Peter Pilewskie, Charles Gatebe, Michael King, Warren Gore, Rose Dominguez Project - PowerPoint PPT Presentation

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Jetstream 31 (J31) in INTEX-B/MILAGRO: Science Goals, Payload, Required Flight Patterns, and Status Phil Russell, Lead PI Instrument PIs: Jens Redemann, Brian Cairns, Peter Pilewskie, Charles Gatebe, Michael King, Warren Gore, Rose Dominguez Project

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CAR integration is in progress. ... leg under LaRC KA, CAR maneuvers ... Specs & Performance. 5 hr (incl 1 hr reserve) Endurance. 850 nmi. Range. 220 kt. 150 kt ... – PowerPoint PPT presentation

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Title: Jetstream 31 (J31) in INTEX-B/MILAGRO: Science Goals, Payload, Required Flight Patterns, and Status Phil Russell, Lead PI Instrument PIs: Jens Redemann, Brian Cairns, Peter Pilewskie, Charles Gatebe, Michael King, Warren Gore, Rose Dominguez Project


1
Jetstream 31 (J31) in INTEX-B/MILAGROScience
Goals, Payload, Required Flight Patterns, and
Status Phil Russell, Lead PIInstrument PIs
Jens Redemann, Brian Cairns, Peter Pilewskie,
Charles Gatebe, Michael King, Warren Gore, Rose
DominguezProject Office Michael Gaunce, Sue
TolleyFlight Ops Ben Hovelman
Selected updated materials presented at
MILAGRO and INTEX-B Joint Science Teams Meeting,
24-28 October 2005, Boulder, Colorado
SENEAM-MILAGRO ATC/Air Crews Meeting, 2 December
2005, Mexico City
2
J31 in INTEX-B/MILAGRO Aerosol, Water Vapor,
Cloud, Surface Properties and Radiative Effects
  • GOALS
  • Characterize the distributions, properties, and
    effects of aerosols and water vapor advecting
    from Mexico City and biomass fires toward and
    over the Gulf of Mexico
  • Aerosol Optical Depth And Extinction Spectra
    (354-2138 nm)
  • Water Vapor Columns And Profiles
  • Aerosol Radiative Impacts In Clear Sky (Direct
    Effect) Via Clouds (Indirect Effect)
  • Test the ability of Aura, other A-Train Terra
    sensors, airborne lidar to retrieve aerosol,
    cloud, and water vapor properties
  • Characterize surface spectral albedo and
    bidirectional reflectance distribution function
    (BRDF) to help improve satellite retrievals
  • Quantify the relationships between the above and
    aerosol amount and type

3
J31 in INTEX-B/MILAGRO Payload
Ames Airborne Tracking Sun- photometer (AATS) Solar Spectral Flux Radiometer (SSFR)
Research Scanning Polarimeter (RSP) Cloud Absorption Radiometer (CAR)
Position Orientation System (POS) Met Sensors Nav/Met Data System
4
The scientific goals of the J31 require flights
containing the basic elements or patterns shown
below.
  • Survey Vertical Profile.
  • (2) Minimum-Altitude Transect.
  • (3) Parking Garage (Stepped Profile with legs of
    3-10 minutes).
  • (3') Parking Garage with CAR Maneuvers.
  • (4) Above-Cloud Transect.
  • (4') Above-Cloud CAR Maneuver.
  • All J31 scientific instruments measure sunlight,
    which is strongly influenced by clouds.
  • Hence, J31 flight patterns are cloud-sensitive
    many seek to avoid clouds, while others seek to
    fly above certain types of clouds.
  • Because clouds can change quickly and are
    difficult to predict, J31 flight plans usually
    require flexibility to change in response to
    clouds.

5
J31 FlightsOperational Overview
  • 10-20 Science Flights from Veracruz (1-21 March
    2006)
  • Typical flight duration 2-4 hours (45 hours
    total)
  • All flights during daylight hours. Nominal
    takeoff between 8 AM and 4 PM local. Fly seven
    days/week.
  • Arrive VER from US 28 Feb 2006. Depart VER 22 Mar
    2006.
  • "Parking Garage" pattern is a stepped profile
    with ramped legs linking horizontal legs, each
    3-10 minutes long.
  • Timing is critical on flights coordinated with
    satellite overpasses and with other aircraft
    (NASA King Air DC-8, NCAR C-130).

6
J31 Status9 January 2006
  • CAR integration is in progress.
  • AATS, SSFR, RSP, POS, Nav/Met were integrated
    for previous J31 missions. They will be
    re-integrated and test flown in February.
  • Logistical arrangements are in progress. This
    has included a visit to Veracruz airport last
    November/December by Gaunce Russell.
  • 7 preliminary flight plans were presented to
    SENEAM last December to illustrate goals. They
    include flights over Gulf of Mexico, land areas
    downwind of the Mexico City Metropolitan Area
    (MCMA), and possibly MCMA and the Pacific Ocean.
  • The meeting with SENEAM was very successful, and
    we expect to be able to accomplish our goals
    within the constraints of the air traffic control
    system.

7
J31 Typical Flight Plans Selected from 7
presented to SENEAM 2 December 2005
This is a collection of preliminary flight plans
for J31 operations out ofVeracruz and flights
over the Gulf of Mexico, land areas downwind of
the Mexico City Metropolitan Area (MCMA), and
possibly MCMA and the Pacific Ocean, during the
March 2006 MILAGRO campaign. Note
  • These drafts were used to initiate negotiations
    with SENEAM on final flight plans that will
    accomplish as many of our scientific objectives
    as possible within the constraints of their
    air-traffic control system.
  • These plans may not include all flight scenarios
    parts of them may be combined but in general they
    would be shortened rather than lengthened for
    actual operations.
  • Extensive ground-based measurements will be made
    at two sites to the north of the MCMA, at
    distances approximately 20 and 40 miles from the
    center of the MCMA, representing two times, T1
    and T2, in the chemical and physical evolution
    of material transported away from the MCMA, under
    southerly wind conditions.

8
FLIGHT J31A CALIPSO/A-Train underflight, LaRC KA
underflight, CAR maneuvers
Pt. Lat Lon Alti- tude (ft) Time (UT)
1 19.15 -96.19 100 1846
2 20.02 -94.16 23,000 1923
2 20.02 -94.16 200 1953
3 21.71 -94.44 200 2041
3 21.71 -94.44 23,000 2106
3 21.71 -94.44 2,000 2131
3 21.71 -94.44 200 2141
4 19.33 -96.11 23,000 2232
4 19.33 -96.11 23,000 2242
4 19.33 -96.11 200 2307
5 19.15 -96.21 2,000 2311
5 19.15 -96.21 2,000 2339
6 19.15 -96.19 100 2341
Duration 455
  • 2. 5 minutes straight level, then spiral
    descent on CALIPSO/A-Train track.
  • 2-3. Minimum-altitude leg under A-Train track for
    gradients of
  • AOD (CALIPSO, MODIS-Aqua, OMI-Aura, POLDER),
  • Water vapor (TES-Aura, AIRS-Aqua, MODIS-Aqua)
  • Radiation (J31 SSFR)
  • Spiral up, 5 min straight level, then parking
    garage down in MC outflow. CAR orbits at 2,000 ft
    in parking garage.
  • 3-4. Climb above aerosols near midpoint of leg.
  • 4. 10 min straight level with LaRC King Air,
    then spiral down in LaRC King Air curtain (see
    Flight KA1).
  • CAR maneuvers AERONET rendezvous at min alt
  • Matches with plan KA8

9
FLIGHT J31B Spirals low leg under LaRC KA, CAR
maneuvers (Possible MISR/MODIS Terra underflight,
AEGIS simulation)
Pt. Lat Lon Alti- tude (ft) Time since takeoff
1 19.15 -96.19 100 000
2 19.16 -95.91 200 006
2 19.16 -95.91 20,000 036
3 20.01 -98.91 M.P. 147
3 20.01 -98.91 23,000 217
4 20.12 -97.06 23,000 259
4 20.12 -97.06 2,000 329
5 19.15 -96.19 100 351
Duration 351
M.P. Minimum Permitted altitude
  • 2. Spiral up under King Air, then 5 min straight
    level with KA
  • 2-3. Minimum-altitude leg under King Air
  • Spiral ascent under King Air in MC outflow at T2,
    then 5 min straight level with KA
  • Car maneuvers over vegetation
  • AERONET Cimel rendezvous on landing at airport
  • Matches with plan KA9

AEGIS is an aerosol/cloud satellite mission
concept being developed by GSFC, GISS, Langley,
and JPL.
10
FLIGHT J31D Terra MISR MODIS underflight,
Radiation gradient under MC outflow, Cimel leg
Pt. Lat Lon Alti- tude (ft) Time (UT)
1 19.15 -96.19 100 1500
2 22.51 -96.08 200 1633
2 22.51 -96.08 23,000 1708
2 22.51 -96.08 2,000 1739
2 22.51 -96.08 200 1743
3 19.27 -96.15 200 1912
3 19.27 -96.15 23,000 1947
4 19.15 -96.19 100 1951
Duration 451
  • 1-2. Minimum-altitude leg under Terra MISR swath
    for gradients of
  • AOD, Angstrom exponent (MISR, MODIS-Terra),
  • Water vapor (MODIS-Terra)
  • Radiation (J31 SSFR)
  • Spiral ascent in MC outflow including Terra
    overpass time (1654, 17Mar06), then 5 min
    straight level in solar principal plane, then
    parking garage with CAR BRDF measurement at 2,000
    ft. Coordinate spiral w DC-8?
  • 2-3. Repeat minimum-altitude gradient leg on
    return
  • Spiral up, then 5 min straight level above
    polarized Cimel at airport.
  • Matches with plan KA11

11
FLIGHT J31E CALIPSO/A-Train underflight, NASA
King Air DC-8 coordination in MC outflow, Urban
CAR maneuvers
Pt. Lat Lon Alti- tude (ft) Time (UT)
1 19.15 -96.19 100 1743
2 19.20 -96.01 200 1746
2 19.20 -96.01 200 1748
3 22.50 -97.02 200 1923
4 22.38 -97.29 200 1931
4 22.38 -97.29 200 1933
5 22.50 -97.02 200 1941
5 22.50 -97.02 23,000 2006
5 22.50 -97.02 200 2036
6 22.30 -97.86 2,000 2052
6 22.30 -97.86 8,000 2132
7 19.15 -96.19 100 2229
Duration 446
2-3. Minimum-altitude leg under A-Train King
Air for gradients of - AOD (CALIPSO, MODIS-Aqua,
OMI-Aura, POLDER), - Water vapor (TES-Aura,
AIRS-Aqua, MODIS-Aqua) - Radiation (J31
SSFR) 3-4-5. Orthogonal low-altitude leg to
define gradients below coming spiral. 5
(3). Spiral up, then 5 min straight level in
solar principal plane, then parking garage in MC
outflow including CALIPSO overpass time (1953 UT,
3Mar06). Coordinate spiral w DC-8. 5-6. Climb
above aerosols 6. CAR maneuvers at 2,000, 6,000,
8,000 ft.
12
Jetstream-31 in INTEX-B/MILAGRO
Parameter Specification
Length 47 2
Wingspan 52
Ceiling 25,000
Airspeed Max cruise 16,000 Survey 220 kt 150 kt
Range 850 nmi
Endurance 5 hr (incl 1 hr reserve)
Specs Performance
13
The A-Train is a set of satellites that fly in
sequence over a common ground track
Many J31 flights will include legs or profiles
under the A-Train or other satellites
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