slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Local & Worldwide Messaging PowerPoint Presentation
Download Presentation
Local & Worldwide Messaging

Loading in 2 Seconds...

play fullscreen
1 / 10
winter-marsh

Local & Worldwide Messaging - PowerPoint PPT Presentation

89 Views
Download Presentation
Local & Worldwide Messaging
An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. Local & Worldwide Messaging With Amateur Position Reporting System

  2. APRS Packet Overview • Packets Travel from One Digipeater to Another • The Digipeaters are only concerned with distributing APRS type data. • The data can contain Position Information, Objects or Messages • Digipeaters route packets on the air • IGATEs route packets through the internet • GATEs route packets between frequencies

  3. How Does A Digipeater Route A Packet? For now, Let’s ignore the contents and examine the routing. WIDEn-n KB8ZGK-15>GPSLV,RELAY*,WIDE3-3:$GPRMC,163400,A,... KB8ZGK-15>GPSLV,RELAY*,WIDE3-2:$GPRMC,163400,A,... KB8ZGK-15>GPSLV,RELAY*,WIDE3-1:$GPRMC,163400,A,... TRACEn-n KB8ZGK-15>GPSLV,TRACE3-3:$GPRMC,163400,A,... KB8ZGK-15>GPSLV,K9DOG*,TRACE3-2:$GPRMC,163400,A,... KB8ZGK-15>GPSLV,K9DOG*,K9PUP*,TRACE3-1:$GPRMC,163400,A,... KB8ZGK-15>GPSLV,K9DOG*,K9PUP*,K9KAT*, TRACE3-0:$GPRMC,16340..

  4. How Does an APRS Position Report Travel? Since APRS Packets Aren’t Addressed To A Particular Station, Anyone Can Hear Them And If An IGATE Station Hears The Position Report, It Is Passed On To the Internet For Everyone To See The Data Moves Outward In Tiers A Position Report Bounces From One “Digipeater” To Another Internet

  5. Differences Between Messages and Other Types Of Data • All APRS data is broadcast using UI Frames. • All APRS stations hear and display all traffic. • Messages are the only type of APRS data that will cause a station to generate a reply.

  6. How Messages Are Created, Routed, and Acknowledged

  7. Sending Long Distance Messages from APRS • Messages are sent over the air as usual. • An IGATE hears the message and routes it to all other IGATES. • The IGATE nearest the Destination Station retransmits the message out onto the air. • The Destination Station ACK’s the message. • The local IGATE retransmits the ACK and the Destination Station’s position on to the air.

  8. Sending Long Distance Messages from APRS KD4RDB sends message to K4TWE; Nearby IGATE hears it k4twe The IGATE nearest KE4TWE retransmits the message on the air. INTERNET kd4rdb All other IGATEs hear the message but do not retransmit it because they don’t know where K4TWE is.

  9. Sending ICQ Messages with APRS 1.Address your APRS message to ICQSERVE 2.Make the 1st word in the text of the message the ICQ UID number 3.The rest of your message will be sent to the recipient as text 4.You will receive a confirmation message from nearest IGATE *If you register your ICQ UID with the ICQSERVE messages can be sent to your callsign OR ICQ UID number.

  10. Sending EMAIL Messages with APRS 1.Address your APRS message to EMAIL 2.Make the 1st word in the text of the message the EMAIL address 3.The rest of your message will be sent to the recipient as text 4.You will receive a confirmation message from nearest IGATE