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SABER Science, Measurement Approach and Data Product Overview.

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Presentation on theme: "SABER Science, Measurement Approach and Data Product Overview."— Presentation transcript:

1 SABER Science, Measurement Approach and Data Product Overview

2 James M. Russell III PI Hampton University Martin G. Mlynczak Associate PI NASA LaRC Co-Investigators Ellis E. Remsberg NASA LaRC Doran J. Baker SDL, USU Patrick J. Espy BAS, Cambridge James C. Ulwick SRL, USU Rolando R. Garcia NCAR Raymond G. Roble NCAR David E. Siskind NRL Larry L. Gordley GATS, Inc. Manuel Lopez-Puertas IAA, Spain Richard H. Picard AFRL Christopher J. Mertens NASA LaRC SABER Science Team

3 SABER Science Goal To provide new data and improved understanding of the structure, energetics, chemistry and dynamics of the TIMED core region extending from 60 km to 180 km

4 SABER Scientific Objectives Study the M/LT thermal structure and its variations Implement studies of energetics and radiatively active species in the non-LTE environment Analyze Oy and HOy chemistry Conduct dynamics studies

5 SABER Measurement Objectives Conduct global-scale, simultaneous, vertical profile measurements of temperature, key chemical constituents, and key emission features, including the following: - Kinetic Temperature - O 3, H 2 O, NO, CO 2 - O 2 (1  ), OH(  ), NO(  ), O 3 ( 3), CO 2 ( 2) - Atomic Species O and H (O inferred 4 different ways)  Conduct measurements (e.g., T, O 3, H 2 O, CO 2 ) that can be used to derive and study dynamical quantities such as geopotential height and potential vorticity Conduct measurements of O 3, H 2 O, OH(  ), O, and H to study ozone and odd hydrogen photochemistry in this region

6 Conduct measurements of key radiative emissions to study energetics in the TIMED core region - True cooling: CO 2 ( 2), NO(  ), O 3 ( 3), H 2 O( 2) - Solar heating: O 3, O 2, CO 2 ( 3) - Chemical heating:O 3, O 2, OH(  ) - Reduction of solar and chemical heating efficiencies: O 2 ( 1  ), OH(  ), O 3 ( 3), CO 2 ( 3) SABER Measurement Objectives (continued)

7 SABER TIMED Science Contributions Measures T and  in the TIMED core region globally Observes key constituents in the lower portion of the core region globally including O 3, H 2 O, [O], [H] and CO 2 Measures tracer molecules CO 2 and H 2 O for dynamics studies Measurements made day and night with high vertical resolution (2.2 km IFOV) independently of spacecraft attitude and attitude rate information Main radiative emission features for energetics are measured: true cooling, chemical heating, solar heating and key emissions that reduce solar and chemical heating efficiency Observations cover altitude range from the GW source region in the stratosphere, to altitudes where GWs break (~100 km), and in the lower thermosphere

8 SABER Experiment Approach

9 LIMB EMISSION EXPERIMENT VIEWING GEOMETRY AND INVERSION APPROACH N(Ho)    J (x) dx d   x RAY PATH TO SATELLITE TANGENT POINT Ho Z } Ho N(Ho) d  (,q,T,P) dx q known (e.g. CO 2 )  J T J known  q (e.g. O 3, H 2 O, CO 2 …)

10 SABER Focal Plane Channel Locations # 4 O 3 9.3  m # 5 H 2 O 6.8  m # 2 CO 2 - W 15.0  m # 6 NO 5.3  m # 1 CO 2 - N 15.2  m # 3 CO 2 - W 15.0  m# 7 CO 2 4.26  m # 8 OH(A) 2.07  m# 9 OH(B) 1.64  m # 10 O 2 ( 1  ) 1.28  m 1.49 o 2 km @ 60 km

11 100 200 300 -100 0 Tangent Point Altitude (km) Radiance (watts/cm 2 -sr) 0 -100 100 200 300 SABER Daytime Radiance Versus Altitude for 55 o S, 287 o E, January 8, 2002

12 SABER Measurement and Inflight Calibration Cadence Downscan or upscan every ~53 seconds - ~450 km to ~ –20 km tangent height in ~3.5 o latitude Spacelook Counts updated every ~ 3.5 Minutes Responsivity updated every ~ 8 Minutes by viewing a hot In-Flight Calibration (IFC) Blackbody

13 SABER In-flight Calibration System Updates Spacelook Counts Every ~ 3.5 Minutes Adaptive Scan 107 secs Baffle Scan 7secs Gain Cycle Spacelook 11secs Calibration Scan (BB) 12secs Space Ground Acquisition scan finds the limb Adaptive scan tracks the limb

14 SABER In-flight Calibration System Updates Responsivity Every ~ 8 Minutes IFC to Calibration 7mins 52secs Calibration Scan (BB) Calibration Scan (JS1) Calibration Scan (JS2) Calibration Scan (JS3) Space Ground

15 TIMED spacecraft being prepared for acoustic tests at the NASA Goddard Space Flight Center SABER Views on the Beam of the Spacecraft

16 North viewing phase of the TIMED yaw cycle SABER Daily Latitude versus Longitude Coverage (83 o N - 52 o S) Longitude (degrees) Latitude (degrees)

17  Vertical profiles of the following parameters day and night: - Kinetic T, P, density10 - 105 km - O 3 mixing ratio (9.6  m)15 - 100 km - O 3 mixing ratio (1.27  m)*50 - 95 km - H 2 O mixing ratio15 - 80 km - CO 2  (4.3  m and 15  m) 85 - 150 km - NO 5.3  m VER ** 100 - 180 km - OH 1.6  m VER ** 80 - 100 km - OH 2.0  m VER ** 80 - 100 km - O 2 ( 1  ) 1.27  m VER ** 50 - 105 km * Day only ** Volume Emission Rate SABER Level 2A Routine Data Products

18 NLTE SABER and HALOE Temperature

19 SABER Level 2A Analysis Data Products Kinetic T, P, densityZ  105 kmnight and day [O] concentration - O 3 day / night  ‘s60 - 80 kmday - O 2 ( 1  ) nightglow80 - 100 kmnight - O 3 (9.6  m) / OH(2.0  m)80 - 100 kmnight - CO 2 (4.3  m) / CO 2 (15  m)100 -135 kmday [H] Concentration80 - 100 kmnight and day CO 2 (15  m) 20 - 140 km NO (5.3  m) 100 - 180km O 3 (9.6  m) 20 - 100 km H 2 O (6.7  m and far IR) 20 - 70 km - Cooling Rates - Temperature and Constituent densities

20 SABER Level 2A Analysis Data Products Solar heating rates, including airglow losses (20 -100 km) - O 3 (Hartley, Huggins, Chappius, and other uv bands) - O 2 (Schumann-Runge, Ly- , Herzberg, and Atmos. Bands) - CO 2 (4.3  m) Chemical heating rates (80 - 100 km) - O x and HO x families Airglow/Chemiluminescent, Emission/Heating Efficiency - O 2 ( 1  )50 - 105 km - OH(1.6  m)80 -100 km - OH(2.0  m)80 -100 km Geostrophic Wind20 - 100 km

21 Comparison of SABER NO 5.3  m Energy Loss Rates for April, 2002 and October, 2003 solar storms October 30, 2003 82 o N April 20, 2002 82 o S Peak energy loss rates are comparable for the two storms

22 SABER Level 3 Data Products Zonal mean pressure versus latitude cross sections - Orbit, daily, weekly, monthly and seasonally averaged Polar stereographic and Lambert projection maps on constant pressure and isentropic surfaces - Orbit, daily, weekly, monthly and seasonally averaged maps

23 SABER NLTE Temperature Zonal Mean Cross Section and global plot on July 9, 2002


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