**Summary and progress (Rough Draft)**

**10/03/2008**

**\[Simulation of observation 6/5/2008\]**

Attendee

Lars Peter Riishojgaard, Ron Errico, Nedjeljka Zagar, Jack Woollen,
Yanqiu Zhu, Yucheng Song, Dagid Groff, Haibing Sun, Tong Zhu, Michiko
Masutani

Come to Yanqiu\'s talk: Yung Han, Mark Liu, Min-Jeong Kim, Xiujuan Su

Dial in

Erik Andersson (ECMWF)

Nikki Prive, Danzo Devenyi, Tom Schletter (ESRL)

Chris Hill, Haldun Karan(MSU)

Oreste Reale (NASA/GLA)

Sid Wood (SWA)

Agenda

Presentation by Yanqiu Zhu about Adjoint Technique

Progress in simulation of radiance at GMAO

Response from ECMWF about performance of T799 NR

**\[Getting Ready for ADM-Aeolus 7/11/2008\]**

Seminar and discussion with David Tan

Atendee

David Tan (ECMWF)Greg Krasowski (JCSDA and work with  Dennis Keiser),
Hongming Qi (OSDPD), Jack Woollen (EMC).  Tong Zhu (NESDIS),

Telecom: Zhaoxia Pu (Utah), Yuanfu Xsi(ESRL)

We went though documentations and bufr table. EE format and bufr
conversion.  We discuss about how we will receive ADM data.  We thought
that the involvement of Hongming will depend on whether ADM data will
come from GTS or ftp. Anyway Greg will be getting ready for ADM
preprocessor.\
\
Seminar was attended by only about  15 people.  This was a little
disappointing. But people who came to the meeting become much more
prepared for ADN and idea of space based DWL. The presentation is
posted.

Talk_Tan_AeolusDataProcessing_JCSDA_20080710.sml.ppt\
\
In the afternoon, Dave showed installation of L2BP processor.  We tested
at NESDIS linux machine and  at University of Utah with Zhaoxia\'s help.
 Detail documentation was very helpful. Greg will test on IBM and
contact with David.\
\
L2BP_Release 1.33 and documentations are posted at

ftp://ftp.emc.ncep.noaa.gov/exper/mmasutani/ADM

Documentations are also posted

http://www.emc.ncep.noaa.gov/research/JointOSSEs/Manuals/ADM/L2BP_Release1.33_doc/

The most basic documentation is Sofrware Release Note and
AE-RN-ECMWF-L2BP-001_20080229_SRN_Iss1.33.pdf we went through
installation procedure following the documentation. Thy are still test
version and not available from public site, yet.  We will test and
report bugs to David.\
\
Michiko suggested that it is worthwhile to simulate L1B data from T511
Joint OSSE NR for ADM.  Instead of going through Aeolus E2S (End-to-End
Simulator), KNMI can simulate L1B data which simulate errors due to the
different between NR and DAS model. However, this seems to be much more
complicated and KNMI and SWA will simulate L2B data.

We still have to discuss about Bufr table for L2B. relevant materials
are

AE_SAF_KNMI_L2BP_003_Setup_Guide.v1.1.20080520.pdf

The code to write L2b data is

out_pseudoPilot.f

Gert-Jan is planning to attend LWG meeting in next winter and discuss
with SWA about simulation of DWL. Ad Stoffelen may be able to visit US
in summer 2009.

Both SWA and Arlindo has aerosol simulator for DWL, We are trying to
hold a meeting with SWA and NASA.

**\[OSSE subgroup meeting meso-regional OSSE on 7/31\]**

**Draft 080813**

**-Attendee**

WWB

Fuzhong Weng (NESDIS), Chris Hill (MSU), Jack Woollen(EMC), Yoshiaki

Sato (EMC), Tong Zhu (NESDIS), Michiko Masutani (EMC)

Tele-Conference

Thomas Jung (ECMWF), Zhaoxia Pu (University of Utah), Pat Fitzpatrick

(Mississippi Stateve Univ), Xingang Fan(Mississippi Stateve Univ),
Joeseph Ardizzone (NASA/SIVO), Juan Jusem(NASA/SIVO)

ESRL

Steve Koch, Steve Weygandt, Dezso Devenyi, Yuanfu Xie, Nikki Prive, Ming
Hu

Apology of absence received from

Oreste Reale (on leave), Tom Schlatter (Trekking in the Alps), Ron

Errico(on leave), Lars-Peter(other meeting), Erik Andersson (sent Thomas
Jung)

**- Presentations and Materials**

The material used at the meeting are posted at

http://www.emc.ncep.noaa.gov/research/JointOSSEs/record/2008/Jul08/

Agenda and highlight of results from past presentations

Agenda_080731.ppt

Joint OSSE NRs were produced by EMCWF model 32r1. At ECMWF 32r2 and 32r3
has been developed since then. Diagnostics results focused on hurricanes
prediction by recent EMCWF models were presented by Thomas Jung of
ECMWF.

Jung_ECMWF_Nature_Run_TJ.ppt

ECMWF Tech Memo about recent model change is available in .

Bechtold_32R2_tm556.pdf

Case study of spring storm in T799 NR by Chris Hill of MSU

MSU_case_event_T799_080731.x.ppt

Some sample estimation for resources required

Resource_estimate.draft0812.doc

Introduction to Namx

Namx_Intro.txt

Plans at University of Utah is posted. I am sorry we receive the

presentation too late to show in the meeting.

Pu_JOSSEs_Plan_080731.ppt

After the meeting, Dr. Juan Jusem sent me a few figures to show an inter

annual variability of precipitation over South America.

Jusem_T511_S_Ame_Precip.ppt

\[Evaluation of T799 NR by Thomas Jung\]

Thomas Jung presented the recent development in ECMWF model. Joint OSSE
NRs are produced by version 32r1. He showed the significant development
in 32r2 and 32r3.

[Another "Nature Run"]{.underline}

-   A large set of seasonal TL511L91 integrations has been carried out
    for many summers and winters:

    -   NDJFM 1990-2005

    -   JJASON 1990-2005

-   Data have been archived on PL and SFC levels only (6-hourly)

-   Advantage: We get an idea of the climate of IFS cycle 31R1 at TL511
    used to carry out the "Nature Run"

[Summary: Extratropical Cyclones 31R1 @ T511 (DJFM)]{.underline}

-   Synoptic activity (extratropics):

    -   Generally well represented

    -   Distribution of storm frequency quite realistic

    -   Problems in the Gulf Stream/Kurushio area?

    -   Too many systems in the eastern Atlantic (blocking)

[Summary: Tropical Cyclones 31R1 @ T511 (DJFM)]{.underline}

-   T511 model produces quite realistic frequency of occurrence of
    TS/Hurricanes in the Atlantic.

-   North African Monsoon too strong + northward shifted.

-   AEJ is too weak (problem at higher resolution).

-   Perhaps slightly too much AEW activity.

-   Strong problems in the western tropical Pacific (too little
    atmospheric upwelling). Problem larger at higher resolution.

```{=html}
<!-- -->
```
-   Amplitude of the MJO is underestimated (better in recent cycles but
    still an issue).

-   Convectively coupled Kelvin waves in the tropics are underestimated
    (better from 32R3 onwards).

-   Too little (much) precipitation over the tropical continents
    (oceans) (improved in recent cycles).

-   No QBO

-   Euro-Atlantic blocking significantly underestimated (large
    improvements in 33R1).

-   Anti-cyclonic circulation bias in the North Pacific (fixed in 32R3)

[Tropical Cyclones: 32R3 vs 32R2]{.underline}

-   Generally there is an increase in the number/intensity of tropical
    cyclones/hurricanes.

-   Particularly lower resolution versions perform better than older
    cycles (e.g., US landfall).

-   Large increases in the western tropical Pacific (partly due changes
    in the large-scale atmospheric circulation). Too large?

[Sensitivity to Horizontal Resolution]{.underline}

-   Short-range and medium-range forecasts suggest that T799, if
    anything, produces stronger hurricanes than T511.

-   Resolution studies, however, suggests, that some aspects of the
    tropical climate (i.e., beyond the medium-range) of 31R1 deteriorate
    when increasing horizontal resolution (T159-\>T511). So it *may* be
    possible that T799 performs worse than T511.

-   In the extratropics the largest changes occur when going from T95 to
    T159. Rather little changes occur beyond T159 (T159-\>T511). Hence,
    it seems reasonable to assume that T511 and T799 perform similar.

**- Comments on T799 NR-**

[Presentation by Chris Hill]{.underline}

Chris found a good storm over Mississippi state in May but it was out of
season. It seems surface temperature of T799 NR by 32r1 get colder and
managed to produce storm in May. There are other storms in mid west
during April. Although hurricanes in T799 NR look weaker than hurricanes
in T511 NR, we may still use this NR to study data impact on mid
latitude storm.

[Oreste Reale commented in E-mail]{.underline}

It seems that Thomas\'s conclusions do not contradict my preliminary
findings. I never had doubts that the t799 was superior in forecasting
mode within few days from initialization. However, in spite of being the
t799 a better model in forecasting mode, its performance may deteriorate
with long integrations. So it is possible that the t511 Nature Run\'s
overall representation of tropical cyclone activity may be more
realistic.

[Stgeve Weyngard commented on Regional Nature run]{.underline}

From the experience in previous regional OSSEs, nesting regional model
causes noise and uncertainty from lateral boundary condition. The
weather in regional NR could be quite different from global model which
provide lateral boundary conditions. These uncertainties could be large
enough to smear out any interesting data impact.

[Bob Atlas wrote to Michiko and Lars-Peter]{.underline}

There is a strong need for regional OSSEs at 1km resolution as part of
HFIP. Much of this relates to non satellite observing systems.

(He commented various ongoing projects but I could not verify.)

[Steve Lord\'s Comments on Bob Atlas\'s remark]{.underline}

I disagree with this statement of \"strong need.\"  We don\'t even know
how to do data assimilation at 1 km resolution in a hurricane.  OSSEs
tend to be valuable when there is a well-established body of knowledge
surrounding a mature technology, like global weather forecasting.  For
episodic work, like hurricanes, the body of knowledge is almost
impossible to accumulate.  As an example, to demonstrate the validity of
the new Hurricane WRF, more than 1000 cases were necessary, and the
Quikscat validation study required \~100 cases to differentiate the \"no
impact\" result.

[Michiko]{.underline}

T799 NR 91 level NR is claimed to have 25km resolution. However, this is
based on linear grid used to compute physics. The resolution of NCEP
hurricane model is 9km inner; 27km outer; 42 vertical layers. A regional
models may produce better looking hurricanes in higher resolution (4km
2km etc), but without further development in physics, just increasing
resolution does not necessarily increase the reliable scale resolved by
the model.

OSSEs are limited by current existing model and existing technology. We
should discuss about what we can do with existing NR.

It is still great if T799 32r3 can produce better hurricanes.

[Zoltan Toth]{.underline}

There are interest in looking into the forced integration issue, where
we would run a T800 model (maybe new GFS configuration?), forced by
\~T200 or T250 and larger scales from operational T382 GSI analysis.
This would be done for Jan-Feb (possibly extending into March) of 2009,
the period of winter T-PARC. We can then run OSSE studies for the same
period, vastly expanding the scope of data impact and data processing
studies that can be done in the field phase of T-PARC\... NOAA THORPEX
may be able to provide seed money for generating the highres nature
integration; other programs/investigators/agencies hopefully would
become interested exploiting the data\...

[Definition of Quick OSSE]{.underline}

Quick OSSE has been discussed by some people. In the paper by Bob Atlas
in ILRC Quick OSSE is defined as:\
\
\"In a \"QuickOSSE\", one or more very accurate numerical model
forecasts of five to ten day duration may be used as a mini-nature run.
Observations are then simulated and data assimilation experiments are
performed in a manner similar to that described above. The advantage of
the QuickOSSE approach is that the impact of a proposed observing system
can be evaluated with regard to a specific storm. In addition, the cost
of a QuickOSSE is much lower and the results are obtained more rapidly.
Nevertheless, QuickOSSEs cannot yield the statistical significance that
might be required, and should only be used as an adjunct to the complete
OSSE methodology described above.\"

[Lars-Peter\'s response to Bob Atlas regarding Quick OSSE]{.underline}

Even though much of this as you say is related to non-satellite
observing systems, I think it is important both scientifically and
programmatically to keep this closely coordinated with the Joint OSSEs
of JCSDA and its partners and international collaborators. Most of the
work that needs to be done is the same whether you are studying
satellite or in situ observations; in both cases much of the work
involves simulating the reference satellite observing system, and that
capability could and should be shared among all parties involved in
OSSEs.

**WRF-VAR or GSI**

We discussed about if regional OSSE should use WRF-Var or GSI. Recently,
WRF-VAR managed to assimilate radiance data using CRTM. However, many
people agreed that assimilation of radiance data using WRF-Var is still
weak and we have to use GSI , if we are interested in data impact of
radiance data.

Chril Hill participated WRF-VAR training course and now trying out
regional GSI using Namx script from Yoshiaki Sato. I hope he will be
able to use regional GSI.

\- DTC support for GSI

Ming Hu wrote to me about the plan at DTC. He said:

\"DTC does have plan to release and support the use of GSI for community

users. Here is a little details on the progress of the plan:

1\) GSI has been installed on NCAR IBM and GSD linux cluster.

2\) GSI is running well GSD Linux cluster.

3\) GSI users guide is ready for NCEP and GSD to review.

DTC is planning to do GSI tutorial on January 2009.\"

We could confirm Hans Huang about this. Giving tutorial sounds a good
support from DTC to GSI.

\- Namx Scripts for GSI

Namx scripts has been set up by Yoshiaki Sato and used by many regional
GSI developpers. There is an option to execute regional analysis and
forecass from global guess only. That would be clean experiments we can
try out to study high resolution observational data.

Some introduction is included in Aganda_080731.ppt

**\[ GMAO Observation Simulator August 27, 2008\]**

Attendee

Ron Errico(GMAO), Runhua Yang(GMAO), Yuanfu Xie(ESRL), Tong Zhu
(NESDIS),Yuchent Song (NCEP), David Groff(NCEP), Min-Jeong Kim(NESDIS)

telecom

Jack Woollen (NCEP), Nikki Prive(ESRL),Daniel Birkenheuer(ESRL), Chris
Hill (MSU), Xingang Fan(MSU), Yongsheng Chen(NCAR)?, more

Presentation by Ron Errico

Errico_GMAO_SimObs_080827.ppt

Documentation

GMAO_SimObs_software8.doc

Requirement, usage and credit

GMAO_Software_Requirement_Usage_Credit.doc

GMAO released the software to simulate observation and release to Joint
OSSE. The software and documentation are posted at gmao ftp site

ftp site: gmaoftp.gsfc.nasa.gov

ID: anonymous

Directory: /ftp/pub/data/ryang/SIMOBSOSSE

(Please note the CRTM used in GMAO observation simulator is research
version of CRTM which made specially available from JCSDA. There are
some differences from public version CRTM Rel-1.1 posted from JCSDA web
site.)

A a copy of the requirement to use this software
(GMAO_Software_requirement_Usage_Credit.doc) and documentations
(software8.doc) are also posted at

http://www.emc.ncep.noaa.gov/research/JointOSSEs

-\> Masnual and Note -\> GMAO_SimObs -\>

We worked on installing the software to vapor at NCEP.

Possible improvement

Multi tasking

Replacing CRTM to public version, Rel-1.1

Call grib decode directly and removing step to save binary files

Further development

New OSSE Software from GMAO

9/23/2008

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--\
Users of the GMAO software for simulating observations for OSSEs\
\
We have made several changes to the software recently:\
1. Changes in software for creating \"conventional observations\"\
   a. include simulated heights in reports originally containing
heights\
   b. simulating QKSCAT observations at 20m instead of 10m\
   c. correcting other minor errors or problems\
\
2. Changes in software for creating satellite observed brightness
temperature\
   a. Corrected major error in treatment of microwave over land and ice\
   b. Added MSU instrument\
   c. corrected other minor errors or problems\
   d. re-tuned cloud effect table\
\
3. Changes to software that adds errors.\
   a. added errors in surface pressure\
\
The software documentation now includes these changes. Given these
changes, we now recommend use of the software for creating simulations
of conventional observations.\
\
We have also obtained 24-hour forecast impact measures for observations
generated with the previous version (i.e., first) of our software, using
the GSI adjoint.  For all types except QKSCAT, the averages for one
month are generally quite close to corresponding impacts for real
observations.\
\
We hope to have validation test results for simulated observations
generated using the new software within one month. At that time we will
release the new software and tuning parameter values. We also hope to
begin drafting a paper describing the new results during this period,
with submission by the new year (Well ahead of our April 2009
deadline).\
\
Ron Errico

**Ongoing work at NOAA**

1\) Michiko has simulated AIRS and HIRS for May 2005. June July 2005 are
almost done.  It seems you have changed cloud code but we need some
radiance data to test our scripts. I hope redoing with new code should
not be hard. This will provide test data for scripts.\
\
Michiko could not make AMSU working, yet. Probably some incompatibility
in files between NCEP and GMAO.\
\
\
2) David, Tong , Haibing and Tom Kleespies are working on verifying crtm
interface.\
The interface code is based on Testforward subroutine written by Paul
and Tong Zhu modified for his use.  I think Runhua started from that
code.\
\
3)  Michiko am trying to make reading nature run fields directly from
file using IDs calling grib decodeer directly from simulator. This will
avoid some mixing up of files.

 \
4) Jack is working on make simple multitasking to speed up simulation.
Probably he will not change the code but do it in the script.\
\
5)Yuanfu and I found a few trouble in your codewhen we compiled on IBM
XLF.  IBM compiler  did not like following features in your code.   If
you fix in a new version that will help us.

**\[OSSE meeting 8/28/2008\]**

General summary of subgroup meetings

**Attendee**

Lars Peter Riishojgaard, Lidia Cucurull, Jack Woollen, Yuanfu Xie,
Yucheng Song, Yoshiaki Sato, Tong Zhu, Michiko Masutani

**Dial in**

Nikki Prive, Danzo Devenyi, Tom Schletter (ESRL)

Erik Andersson, Thomas Jung (ECMWF)

Chris Hill (MSS)

**Appologies for absence received from**

Ron Errico, Oreste Reale, Zoltan Toth

**Agenda**

1.  Summary from subgroup meeting

    a.  ADM Aeolus preprocessor

    b.  Meso-Regional OSSEs

    c.  GMAO Observation Simulator

```{=html}
<!-- -->
```
2.  Evaluation of T511 and T799 NR

Thomas Jung

2.  New Projects

Lidia Cucurull

2.  Plan for calibration and simulation of observation

3.  Estimated resource requirements

4.  Future direction of Nature Run

**Funding for Joint OSSEs**

Lars Peter discussed about effort to get funding for Joint OSSEs.

**Simulation of DWL**

KNMI can simulate L1B data which simulate errors due to the different
between NR and DAS model. However, this seems to be much more
complicated and KNMI and SWA will simulate L2B data.

We still have to discuss about Bufr table for L2B. relevant materials
are

AE_SAF_KNMI_L2BP_003_Setup_Guide.v1.1.20080520.pdf

The code to write L2b data is

out_pseudoPilot.f

Gert-Jan is planning to attend LWG meeting in next winter and discuss
with SWA about simulation of DWL. Ad Stoffelen may be able to visit US
in summer 2009.Both SWA and Arlindo has aerosol simulator for DWL, We
are trying to hold a meeting with SWA and NASA.

1.  Boundary condition for regional analysis

2.  Regional NR add further uncertainty . Regional NR could divert from
    global NR

3.  Regional OSSE for the best use of limited resources

4.  Choice between WRF --var and GSI

5.  Recycling regional forecast or not

**GSI support Plan at DTC.**

Ming Hu (NOAA/ESRL)

\"DTC does have plan to release and support the use of GSI for
communityusers. Here is a little details on the progress of the plan:

1)  GSI has been installed on NCAR IBM and GSD linux cluster.

2)  GSI is running well GSD Linux cluster

3)  . GSI users guide is ready for NCEP and GSD to review.

4)  DTC is planning to do GSI tutorial on January 2009."

**Namx**

Low resolution regional run template by Yochiaki Sato

This will include various options for recycling of mesoscale analysis,
anisotropic error covariance.

**Regional OSSE at MSU**

-   Investigating GSI and WRF-VAR for assimilation of synthetic
    observations

```{=html}
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```
-   ATMS (and later CrIS) radiance simulation by NESDIS

```{=html}
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```
-   Conducting baseline MM5 simulation

    -   T799 data serve as initial conditions and boundary conditions

    -   9-km and 3-km domains

    -   will attempt to extract synthetic observations (i.e. RAOB, SFC)

Out of season winter storm on May 3rd 2006 in T799 NR over Mississippi
provide good sample for MSU.

Haibing may be able to help to simulate ATMS and CrIS orbit.

Coefficient for CrIS for CRTM is in good progress.

**Evaluation of EMCWF NR**

Thomas Jung went over his diagnostics slide. This is repetition to 7/31
OSSE meeting for different audience.

**The version of model used for NR**

We had some confusion in the version of the model. We confirmed that
Joint OSSE Nature run was produced using IFS c31r1.

c31r1 Grib id=128(The version implemented on September 12, 2006)

http://www.ecmwf.int/products/data/technical/model_id/index.html

Interim reanalysis used IFS c31r2 which is slightly upgraded.

There are significant improvement in tropics from c31 to c32r2. It is
very unlikely that ECMWF will rerun the T799 NR with newer version of
IFS. However, producing T1023 NR is considered.

**Quick Satellite View**

Yoshiaki Sato plotted

datTB(ix,iy)=datTB(ix,iy)\*(1.0-datC(ix,iy,iz))+datT(ix,iy,iz)\*datC(ix,iy,iz)

to view quick satellite view.

New OSSE activities

**OSSE capability for GNSS Radio-Occultation (RO) observations**

**Lidia Cucurull (JCSDA)**

> ●There are several options for a COSMIC follow-on mission (different
> orbit configuration, number of satellites, etc)
>
> ●What is the optimal "choice"?
>
> ●CEOS action WE-07-03 on 'evaluation of the requirements to conduct RO
> OSSEs'
>
> ●The action has recently been completed

-   International Joint OSSE project

-   2-yr full time post-doctoral scientist

> ●Hopefully, we will get funding soon

**Requirement for RO OSSE**

> ●Build the interface between the chosen RO simulator and the Nature
> Run
>
> ●Choose the RO products to be simulated
>
> ●Simulate the observations and tune the error covariance matrix for
> the selected constellations
>
> ●Conduct the assimilation experiments
>
> ●Evaluate the results
>
> ●Choose the 'optimal' constellation

**University of Utah**

**Zhaoxia Pu, University of Utah ( Zhaoxia.Pu@utah.edu)**

-   **Evaluation of the ECMWF natural runs**

1\. Winter storms in T511

\* 13 major storms are identified over the Northern American Area

\* further Evaluation is in progress

2\. Hurricanes in both T511 and T799

-   **Regional OSSEs** (Obs: DWL)

A few issues: 1) model and data assimilation systems

2\) boundary condition issues

3\) hurricane intensity (resolution and validation issues)

-   **Evaluation of the ECMWF natural runs**

1\. Winter storms in T511

\* 13 major storms are identified over the Northern American Area

\* further Evaluation is in progress

2\. Hurricanes in both T511 and T799

-   **Regional OSSEs** (Obs: DWL)

A few issues: 1) model and data assimilation systems

2\) boundary condition issues

3\) hurricane intensity (resolution and validation issues)

**Atmospheric Science and Technology Directorate**

**Environment Canada (Yves Rochen)**

My interest is essentially in conducting sensitivity analyses in data
assimilation (currently global as oppose to regional). This work has
only just begun. Am currently conducting an OSSE experiment consisting
of (1) observation simulation using a nature run from our global model
(set here for 120x240 horiz. resolution) and (2) conducting a few
assimilations of this simulated dataset with and without one of the
observation sources. The simulated obs consist of obs as used in weather
forecasting (e.g. radiosondes, AMSU-A among others) plus a couple of
additional stratospheric obs sources. For this first trial, the nature
run is simply a model run covering 2.5 months and the assimilation uses
this same model (realizing that this is far from the best choice but
it\'s a first try) starting from different initial conditions than the
model run. Will see what that gives.

At some point in the future, I would like to take advantage of the
nature runs to be made accessible from your joint OSSE program.

**OSSE at Northrop Grumman**

Project Description:

The primary objective of the effort is to provide NASA with the
capability to quantitatively assess the benefits of observational data
 produced by proposed future observing systems. The research effort
 planned would look into extending the Sensor Web Simulation that NGIT
is  working on with NASA to incorporate a rigorous end-to-end simulation
of  future sensors and observing platforms, thereby allowing an accurate
 assessment of the impact of the operational data they produce on global
 weather forecasts. This supports the OSSE that NASA is pursing
by allowing quantitatively-based decisions on the design and
implementation  of future observing systems. What NGST brings to this
collaborative  effort is EVEREST, the Environmental Product Verification
and Remote Sensing Testbed. EVEREST is a \"world-class\" end-to-end
modeling and  simulation testbed for assessing the performance of remote
sensing  systems. Initially developed to establish the pre-launch
performance of the NPOESS weather satellite system, EVEREST consists of
comprehensive  environmental scenes, databases and validated
state-of-the-science  models for physics-based phenomenology, radiative
transfer, sensors,  spacecraft, and data product retrieval. On the
NPOESS program, EVEREST  has been a critical element in allowing NGST
and the government to  predict the quality of the data products produced
by the NPOESS  sensor/spacecraft system, including the impact of
changing sensor,  spacecraft, algorithm and other system design
parameters. It was also used during the PDRR phase of the GOES-R program
to help establish  system requirements for the program. It is currently
being used to ensure that the as-built NPP/NPOESS system will perform as
specified.

**NCAR interest**

Jennifer S Haase

We are developing an airborne GPS radio occultation system for
atmospheric profiling. 

Xiang-Yu (Hans) Huang suggested I join your OSSE group, because we are
currently doing some

OSSE\'s using his MM5 nature run, but it might be interesting for us to
do some simulatons using your nature runs.

I\'d like to find out more about the project if you have a web site, and
also join the A list.

**Resource requirement**

T382

one node

GSI 4 hour/day (4 cycle)

one 5 day forecast: 2.5 hour ?

4 cycle per day, 5 day fcst twice a day: with one nodes 9 hr/day

T126

2 node

GSI 40min/day (4 cycle)

one 5day fcst 10min

4 cycle per day, 5 day fcst twice a day: with 2node 1hr/day

GOES-R

20km 10 times thining -\> 60 km resolution :

15MB/hr 360MB/day=150GB

20km resolution 3.6GB/day=1.5 TB/year

4lm resolution 3.6x25=90GB/day=33TB/year