met-jobs@lists.reading.ac.uk
June 2011
Message 44

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[Met-jobs] JCSDA vacancies

From "Roger Brugge" <r.brugge@reading.ac.uk>
To "met-jobs@lists.rdg.ac.uk" <met-jobs@lists.reading.ac.uk>
Date Fri, 17 Jun 2011 07:29:54 +0000

The U.S. Joint Center for Satellite Data Assimilation (JCSDA) is dedicated 
to accelerating the transition of new sensors into U.S. operational Numerical 
Weather Prediction (NWP) models. The instruments on-board the future JPSS
mission (and, more imminently, the upcoming NPP mission) will serve as the 
U.S. next-generation polar-based sensors. Major improvements are expected
in measurement accuracy, and spectral and spatial resolutions, with an 
unprecedented set of challenges associated with them. These challenges include
technical aspects such as ensuring that the network bandwidth, the computing 
power, and the storage space are sufficient to handle these data, but also 
include scientific issues such as the optimal usage of the data, the proper 
extension of assimilation and radiative models, and pre-processing algorithms 
to tackle the new measurements.

A number of these sensors (CrIS and ATMS for instance) will initially compl=
ement but ultimately replace a set of current sensors  (AIRS/IASI, AMSU/MHS=
, respectively) that have played an important role in the Numerical Weather=
 Prediction (NWP) assimilation models. The JCSDA is seeking experienced sci=
entists who will complement the data assimilation efforts for the ATMS and =
CrIS sensors.

The aim is to fully prepare the NOAA NWP global assimilation and forecast 
system (GDAS) for the assimilation of the NPP/JPSS ATMS and CrIS data, withis
the infrastructure of the Joint Center for Satellite Data Assimilation 
(JCSDA) and/or the NESDIS/STAR infrastructure.

Some of the effort will focus on performing Observing System Simulation 
Experiments (OSSEs) using CrIS and ATMS proxy data already produced by NESDIS.
This will assess the expected impact of these sensors on global forecast s
kill.

Upon launch of NPP, the efforts will focus on testing the impact of 
assimilating real data from NPP ATMS and CrIS and performing data denial 
experiments (OSEs). This will be coordinated with projects at NESDIS for the 
sensor 
calibration, channel selection, and quality control, and
with the JCSDA's continued development of the Community Radiative Transfer 
Model (CRTM).

To accomplish these tasks, the two scientists sought (one dedicated to the 
assimilation of ATMS microwave data and one dedicated to the assimilation 
of CrIS hyperspectral IR data) must have strong experience in satellite data
assimilation (previous experience with GSI and GFS is a significant plus),
 OSSEs, and passive remote sensing (using variational algorithms). Previous
 experience with AIRS, IASI and/or AMSU, MHS is a plus.  Experience in 
computer languages such as FORTRAN 90/95 and IDL is expected. Knowledge of 
scripting languages such as BASH and Java, and familiarity with software 
configuration tools such as subversion, are also desirable.

Good interpersonal skills are also needed for these positions, as interactions 
with other JCSDA partners are expected.  The results of these efforts are 
expected to be presented at conferences and JPSS technical meetings. 
Therefore, good presentation skills are also required. Up to two trips a year 
are planned.

The positions are located at JCSDA's Headquarters in Camp Springs, MD. For 
application information, please visit the JCSDA website at 
http://www.jcsda.noaa.gov/


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