From: "Patrick" To: 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" 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 *********************************************************** Attachment converted: ./Simulcast.jpg (JPEG/prvw) (00080D95)