2 HS3 Science Team Meeting - BWI - October 19-20, 2010HAMSR/Lambrigtsen HAMSR Status Update (2015) Bjorn Lambrigtsen (HAMSR PI) Shannon Brown (HAMSR Task.

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


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



Very few flights in 2013None in 2014



CalWater2: Jan-Feb 2015Below: Atmospheric river, 2/6/2015


Scattering indexTPW

113 GHz


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



http://microwavescience.jpl.nasa.gov/instruments/hamsr/data/

HAMSR 2013 HS3 Realtime Products

Flights During August 20 – September 23 2013



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



HAMSR KML files available as a bundle in mission tools

Expanding menu used to select between display options





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



Swath data along flight path

75km storm relative gridded image

350km storm relative gridded image







TC center locations for each eye overpass



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



All data within 30 minutes of overpass shown, so rapid overpasses will fill in 50km grid as shown in this Karl example



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)



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



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!



2 HS3 Science Team Meeting - BWI - October 19-20, 2010HAMSR/Lambrigtsen HAMSR Status Update (2015) Bjorn Lambrigtsen (HAMSR PI) Shannon Brown (HAMSR Task.

Documents

hs3 science team meeting

cloud liquid water profiles

flight reports

dropsonde comparisons

vertical resolution1

d atmospheric temperature

atmospheric river

hs3 realtime productsflights