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1HS3 Science Team Meeting - BWI - October 19-20, 2010 HAMSR/Lambrigtsen
HAMSR Status Update (2015)
Bjorn Lambrigtsen (HAMSR PI)Shannon Brown (HAMSR Task Mgr)
JPL/Caltech
HS3 Science Team Meeting – Mountain View – May 5 – 7, 2015 HAMSR/Lambrigtsen© 2015 California Institute of Technology. Government sponsorship acknowledged
National Aeronautics and Space Administration
Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadena, California
Direct measurements:
•Brightness temperatures25 channels
~ 0.5 K cal. accuracy
Derived vertical profiles:Surface to aircraft altitude
1-2 km vertical resolution
1-2 km horizontal resolution
Super-critical sampling
•Temperature profilesDual bands (50 & 118 GHz)
•Water vapor profilesMore accurate than AMSU-B
•Liquid water profiles3 bands V. profile
•Reflectivity profilesExperimental product
: Identical to AMSU : Equivalent to AMSU
HAMSR Measurement OverviewThree spectral bands
25 channels
Weighting functions
Cross-track scanner
Products
Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadena, California
HS3 Science Team Meeting – Mountain View – May 5-7, 2015 HAMSR/Lambrigtsen
Sounders are normally used to determine thermodynamic structure:
• Retrieval of 3-D atmospheric temperature, water vapor and cloud liquid water profiles using optimal estimation inversion approach
• Good agreement with dropsonde observations
• Vertical resolution (averaging kernels) is 2-3 km
Thermodynamics: Accurate soundings
Relative Humidity (%)
mean: -0.5 %= 16.5 %
Absolute Humidity (g/m3)
Temperature (K)
Precipitable Water Vapor (mm)
mean: -0.1K= 2 K
mean: -0.03 mm= 3.0 mm
• 50 dropsonde comparisons during HS3 over a wide variety of atmospheric conditions
• Dropsonde profiles smoothed vertically to match HAMSR vertical resolution
• HAMSR website contains validation reports for each flight
• Reports include comparison to MERRA and dropsondes T,q,RH
3
Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadena, California
HS3 Science Team Meeting – Mountain View – May 5-7, 2015 HAMSR/Lambrigtsen
Very few flights in 2013None in 2014
Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadena, California
HS3 Science Team Meeting – Mountain View – May 5-7, 2015 HAMSR/Lambrigtsen
CalWater2: Jan-Feb 2015Below: Atmospheric river, 2/6/2015
Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadena, California
Scattering indexTPW
113 GHz
HS3 Science Team Meeting – Mountain View – May 5-7, 2015 HAMSR/Lambrigtsen
Data: All products delivered1) http://microwavescience.jpl.nasa.gov/instruments/hamsr/data/; 2)http://espo.nasa.gov/missions/hs3; 3)ftp://hs3.nsstc.nasa.gov
Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadena, California
HS3 Science Team Meeting – Mountain View – May 5-7, 2015 HAMSR/Lambrigtsen
HAMSR 2013 HS3 Realtime Products
Flights During August 20 – September 23 2013
Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadena, California
HS3 Science Team Meeting – Mountain View – May 5-7, 2015 HAMSR/Lambrigtsen
Past 30 minutes
Past 60 minutes
Full Dataset
Select HAMSR channel – TB imagery-Full data set, past 30 minutes or past 60 minutes
• HAMSR provides KML files to mission tools and JPL Portal for display
• Display swath products (e.g. TB imagery, derived products)
• User chooses between complete flight, past 60 minutes or past 30 minutes and relative or absolute color scale
Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadena, California
HS3 Science Team Meeting – Mountain View – May 5-7, 2015 HAMSR/Lambrigtsen
HAMSR KML files available as a bundle in mission tools
Expanding menu used to select between display options
Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadena, California
HS3 Science Team Meeting – Mountain View – May 5-7, 2015 HAMSR/Lambrigtsen
Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadena, California
HS3 Science Team Meeting – Mountain View – May 5-7, 2015 HAMSR/Lambrigtsen
Recent Display Updates• Storm centric gridded plots added to KML display
– Plots placed as overlays over North America– Allows visualization of full dataset avoiding problem of
track overlays in swath display• TC center positions and times for each eye
overpass added as placemarks– HAMSR operator records TC center coordinates after
each eye overpass using real-time imagery– KML file generated with TC center locations for each
pass– Clicking on placemark provides pop-up display with
plots and text information for that overpass
Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadena, California
HS3 Science Team Meeting – Mountain View – May 5-7, 2015 HAMSR/Lambrigtsen
Swath data along flight path
75km storm relative gridded image
350km storm relative gridded image
Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadena, California
HS3 Science Team Meeting – Mountain View – May 5-7, 2015 HAMSR/Lambrigtsen
Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadena, California
HS3 Science Team Meeting – Mountain View – May 5-7, 2015 HAMSR/Lambrigtsen
Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadena, California
HS3 Science Team Meeting – Mountain View – May 5-7, 2015 HAMSR/Lambrigtsen
TC center locations for each eye overpass
Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadena, California
HS3 Science Team Meeting – Mountain View – May 5-7, 2015 HAMSR/Lambrigtsen
Clicking on placemark brings up gridded images for that overpass
55.5 GHz TB, 8 km and 12 km reflectivity shown in this example
Information about overpass shown as text
•Time, Lat, Lon
•54.94 [250mb] and 55.5 [150mb] TB anomaly
•Experimental minimum central pressure derived from warm anomaly
Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadena, California
HS3 Science Team Meeting – Mountain View – May 5-7, 2015 HAMSR/Lambrigtsen
All data within 30 minutes of overpass shown, so rapid overpasses will fill in 50km grid as shown in this Karl example
Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadena, California
HS3 Science Team Meeting – Mountain View – May 5-7, 2015 HAMSR/Lambrigtsen
Planned Products and Documentation
• User guide with full product descriptions will be distributed prior to science flightsPlanned products:– Window channel TB imagery (50.3, 113 and 166
GHz)– Total precipitable water and cloud liquid water
(non-precipitating conditions)– Upper air TB imagery (54.94 and 55.5 GHz and 118
GHz equivalent channels)– Derived Reflectivity (3-levels; e.g. 6, 8 and 12km)
Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadena, California
HS3 Science Team Meeting – Mountain View – May 5-7, 2015 HAMSR/Lambrigtsen
Processing System Upgrade
• Microwave Integrated Retrieval System - MIRS• Developed at NOAA NESDIS by Sid Boukabara’s group• MIRS is now NOAA’s primary MW retrieval system• CRTM has been adapted for HAMSR• MIRS implementation for HAMSR has not yet been done
• New system under development at JPL• Will include scattering Retrievals in the presence of rain• Optimal estimation methodology• Forward model: CRTM
• Also looking at RTTOV• Solver: Under development
• Evaluating solving in geophysical space vs. EOF space
Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadena, California
HS3 Science Team Meeting – Mountain View – May 5-7, 2015 HAMSR/Lambrigtsen
Instrument Status: Green
• Upgrade 50-GHz receiver• Using latest LNA/MMIC technology• Current receiver is perfectly adequate, but expect significantly
better sensitivity (noise performance) with the new receiver• We hope to get it done before 2014 campaign• Replacement transparent to users (but with better data)
• Ready to fly again!
Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadena, California
HS3 Science Team Meeting – Mountain View – May 5-7, 2015 HAMSR/Lambrigtsen