DGPS Decoder 1.0
Paid Version
Publisher Description
Now you can decode DGPS (Differential Global Positioning System) beacon transmissions. DGPS stations transmit the difference between positions indicated by GPS satellite systems and the known fixed position of the station. This allows higher accuracy. DGPS transmissions are 100 or 200 baud and are transmitted on frequencies from 285 kHz to 325 kHz. Hundreds of these stations are operated by the Coast Guard and other agencies, and they can be interesting DX targets. To use this app, you need a radio that can tune the correct frequency range, either in SSB or CW mode. Most shortwave radios can do this. Ideally you use a cable to feed the audio from your radio into your device, but you can also place the radio speaker near your device s microphone, or even better yet, plug earphones into the radio, and place them next to the device s microphone. You may need to experiment to get the best quality audio pickup, without any outside noise or distortion. To assist with practice in setting up the app to decode transmissions, you may wish to first try decoding this recorded DGPS station, set the app for 200 baud and a center frequency of 1000 Hz: http://www.blackcatsystems.com/ipad/DGPS.WAV A typical decoded message looks like this: [23:24:00 08/08/16] 806 12 13 289.0 kHz Driver, VA United States 36.9633 -76.5622 306.61 km 172.711 deg First the current UTC date and time are printed in brackets. Then the station ID, 806 in this case, as well as the two reference IDs, 12 and 13 in this case. That is followed by the assigned frequency, 289.0 kHz for this station. You can compare this value to what your radio is tuned to, they should match. If they don t, then ignore this message, as it was incorrectly received. With weak signals, it is common to receive incorrect messages, because static or other interference has corrupted some of the bits. Just ignore them. The location of the station is then displayed, the city, state, and country, followed by the station location. Then the distance and bearing to the station is displayed, providing you have correctly set your location in the app. You can save your decodes to a text file that you can later view, or transfer to your computer using File Sharing in iTunes. You can select which recording file to append additional text to, or create a new file.
Requires iOS 6.0 or later. Compatible with iPhone, iPad, and iPod touch.
About DGPS Decoder
DGPS Decoder is a paid app for iOS published in the System Maintenance list of apps, part of System Utilities.
The company that develops DGPS Decoder is Black Cat Systems. The latest version released by its developer is 1.0. This app was rated by 1 users of our site and has an average rating of 2.5.
To install DGPS Decoder on your iOS device, just click the green Continue To App button above to start the installation process. The app is listed on our website since 2016-09-06 and was downloaded 150 times. We have already checked if the download link is safe, however for your own protection we recommend that you scan the downloaded app with your antivirus. Your antivirus may detect the DGPS Decoder as malware if the download link is broken.
How to install DGPS Decoder on your iOS device:
- Click on the Continue To App button on our website. This will redirect you to the App Store.
- Once the DGPS Decoder is shown in the iTunes listing of your iOS device, you can start its download and installation. Tap on the GET button to the right of the app to start downloading it.
- If you are not logged-in the iOS appstore app, you'll be prompted for your your Apple ID and/or password.
- After DGPS Decoder is downloaded, you'll see an INSTALL button to the right. Tap on it to start the actual installation of the iOS app.
- Once installation is finished you can tap on the OPEN button to start it. Its icon will also be added to your device home screen.
