November 27, 2010Ottawa D-STAR Symposium

by

DPRS = APRS + D-StarDPRS = APRS + D-Star

VA3YH

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DPRSDPRS

D-star Position Reporting System

APRS = GPS - TNC - Radio D-PRS = GPS - Dstar radio

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DPRSDPRS

DV - 4800 bps

AMBE encoding = 2400 bps + FEC 1200 bps 1200 bps for synchronization and multi use ( Approx 900 bps is available for general use)

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DPRSDPRS

Utilize the slow speed data channel to send GPS data to the Gateway.

ICOM radio converting GPS information to TNC2 fomatted APRS strings

Format Icom introduced a new GPS mode called GPS-

A mode which is shorter in format and includes a CRC.

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DPRS GatewayDPRS Gateway

running javAPRSSrvr report GPS info to aprs.fi

DPRS re-transmission in RF ( 2 M)

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GPS setting in IC92GPS setting in IC92

URCALL to CQCQCQ, RPT1 to the repeater call, RPT2 to the gateway call (repeater call with

"G" in the eighth position). This will allow your data stream to reach the

gateway but prevent it from going any further. GPS data transmit when PTT is pushed.

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DPRS C1 or GPS MessageDPRS C1 or GPS Message

This is the message that is sent when sending GPS. In most radios, it is the C1 message. It may also be called the GPS message.

Message with Checksum and Symbol http://www.aprs-is.net/DPRSCalc.aspx

MV YING IC92AD*1F MV = car symbol, 1F = checksum

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DPRSDPRS

Radio without GPS build in.