From: "Patrick" <patrick.coronado@gsfc.nasa.gov>
To: <direct_broadcast_users@listserv.gsfc.nasa.gov>
Subject: Simulcast software release
Date: Thu, 8 May 2003 10:45:52 -0400
X-Priority: 3
Sender: owner-direct_broadcast_users@listserv.gsfc.nasa.gov
Reply-To: "Patrick" <patrick.coronado@gsfc.nasa.gov>
Status:   

 DB Community,
 
The NPOESS Preparatory Project (NPP) through theNASA Goddard Direct Readout
Labis pleased to announce the first release of the Simulcast system.  It is
designed to produce a 1km and 5km real-time quick look - as the satellite
passess ovehead display of MODIS data.  This first version will only support
real-time visualization of Terraor Aqua MODIS bands and has therefore been given
the name RTModis, for, Real-Time MODIS. 
 
The end goal of the Simulcast system is to provide the DB ground stations witha
mulit-mission user-reconfigurable tool to vizualize all 5 NPP instrument data
streams in real-time, visualized in an instrument-approriate form.  Therefore,
this first version is a stepping stone towards this goal, with expandability
into NPOESS instruments.
 
I have attached one slide that tries to pictorily capture the essence of this
system.  Many of you in the past have requested parsing software for the MODIS
raw data; this is one way of providing you this.  In the provided source code
you can extract this component and use as you require, or use it in its entirety
to serve your own real-time user community.  You will note that in the diagram
there is a reference to RT-STPS as the data source.  Thisis notrequired to run
Simulcast, but you will need a real-time ingest engine that can write the raw
packets to a socket.
 
In this version, Simulcastconsists of two main functions.  Firstly, the RTModis
Server, whichperforms reading, filtering, decoding ofthe MODIS packet data in
real-time from the spacecraft, tracking ofdata quality statistics, and producing
and delivering reduced resolution data products to the RTModis Client.
Secondly, the RTModis Client reads the reduced resolution data product and
presents the data as an enhanced image for the end user, in this caseany of the
36 bands at 5km resolution and a 1,4,3 - RGB composite at 1km resolution.  There
can theoretically be an unlimited number of clients receiving the real-time
MODIS data stream at the same time, but there is a practical limit based on your
network bandwidth.
 
You may download the installation documentation, source code and executable at:
 
http://directreadout.gsfc.nasa.gov/download_technology/db_software.cfm
 
Go to the end of the software table and click on Simulcast.
Documentation and troubleshooting support is limited due to this early release,
but we will make our best efforts to address your questions; we just ask that
you to use the "Contact Us" mechanism on the web portal to help us populate our
FAQ and better serve the DB community.
 
 
Patrick
 
*************************************
Patrick L. Coronado
NASA Goddard Space Flight Center
Applied Information Sciences Branch Code 935
Direct Readout Lab
Bldg 28 Rm W186
Tel: 301-286-9323
Fax: 301-286-1776
http://directreadout.gsfc.nasa.gov
***********************************************************

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