EMWIN-N Document Description

NOAA provides the documents listed below for users of EMWIN-N data that will be transmitted from the GOES-N satellite. These documents when combined will provide both a thorough understanding of the EMWIN-N Receiver being developed by NOAA as a service to EMWIN-N users who will have to transition from the current EMWIN service to the new and provide the needed information for those vendors who seek to design and build a low cost L-Band EMWIN receive station that not only receives the current EMWIN broadcast for the GOES-I through M satellites but also the new generation GOES-N through P satellites.
 
The entire EMWIN documentation package is comprised of five (5) documents and one “zip” file that either contain the specifications (Doc 1 & 2) for the EMWIN system (both up and down link) or a description the EMWIN software based receiver (Doc 3 thru 5) developed by NOAA and instructions on how to setup the software to run on a compatible PC platform or a copy of the Dynamic Link Library (DLL) files (zip file) that perform the demodulation and processing of the EMWIN signal in software.
 
EMWIN-N Document 1 titled “EMWIN-N Signal Specifications” provides detailed information on the EMWIN-N downlink signal. This is the basic technical data that describes the signal, as opposed to the equipment to transmit and receive it. It contains sufficient data on the signal that will be transmitted from the satellite to allow a design of a compatible Receiver.
 
EMWIN-N Document 2 titled “EMWIN Receive Station Specifications” specifies the requirements for an EMWIN receiver station that will be able to receive the next generation GOES Satellites (GOES-N, O, and P) EMWIN signals. It also includes a general description of the Data Link Libraries (DLL) or software that NOAA will provide to perform the more complex demodulation and decoding functions of the receiver.
 
EMWIN-N Document 3 (MS Word document) titled “Prototype EMWIN Receiver Station Design And DLL User’s Manual” describes NOAA’s “prototype” software based receiver, designed to support the DFSK modulation employed in the existing EMWIN-I broadcasts as well as the new BPSK modulation that will be employed in the next generation EMWIN-N broadcasts. The document consists of three sections, 1. Prototype EMWIN Receiver System Description, 2. Configuration Parameters for the NOAA provided executable software modules, and 3. Prototype Receiver System Setup
 
In addition, EMWIN-N Document 3 provides design information that may be useful for developing relatively low cost EMWIN receiver stations, especially those that can employ the NOAA provided executable software or Data Link Libraries (DLL’s). This document may also serve as a basis for a users guide for receivers that incorporate these DLL’s .
 
EMWIN-N Document 4 --- Removed, obsolete.
 
EMWIN-N Document 5 (Adobe Acrobat Reader; PDF format) titled “EMWIN Library” provides information on how the library is to be used, as well as where and how it may fit into an EMWIN receiving station architecture. As such, it is assumed the reader knows a moderate amount about the EMWIN service, as well as both the EMWIN-I DFSK signal and the new generation EMWIN-N BPSK signal. Since this manual deals primarily with a software library, it also assumes some knowledge of software programming and TCP/IP interfaces.
 
EMWIN-N DLL setup file  Removed, obsolete. NESDIS is currently engaged in investigating the possibility of a higher data rate.  The new DLL's will be made available after they are developed and tested.

EMWIN-N Link Budget Analysis  Link budget for the EMWIN service in the GOES-N series of satellites.

EMWIN Receiver Prototype Application Note  Installation note for the EMWIN Receiver Prototype.  Shows the default DLL settings and discusses some troubleshooting.

Schematic of prototype IF adapter  Required to down convert the signal into the audio range for input into a sound card or A/D converter.

Part list for prototype IF adapter  Parts list from the schematic above.