24. Oktober 2020

APRS services overview (english version)

(DK2HM) This overview is provided by DARC local chapter T08 Neuburg-Schrobenhausen
Die Deutsche Version findet man hier: www.t08.net/aprs

APRS is far more than position data

If you know other APRS services please let us know and we will add it to this list.
Please contact  dk2hm @ darc.de  via e-mail.

QRG 2m 144.800 MHz in Germany
144.390 MHz — North America, Colombia, Chile, Indonesia, Malaysia, Thailand 144.575 MHz — New Zealand 144.640 MHz — Taiwan 144.660 MHz — Japan 144.800 MHz — South Africa, Europe Russia 144.930 MHz — Argentina, Uruguay 145.175 MHz — Australia 145.570 MHz — Brazil 145.825 MHz — International Space Station

(some digipeaters also provide 70cm 432.500 but not so common)

APRS services:

If you use apps or software to provide APRS data to the APRS-IS net you often need a so called PASSCODE. It depends on your callsign and can be generated here:

Sending your position
You can generate your position via radio or via tcp/ip with apps like APRSdroid or aprsmap etc.
You can look up your position on www.aprs.fi or www.aprsdirect.com
List of APRS radio- or tool identifiers http://aprs.org/aprs11/tocalls.txt

Sending APRS messages
Via hf radio to a callsign or service
or via http://www.findu.com/cgi-bin/entermsg.cgi?
All messages regarding a certain callsign can be listed here:
http://www.findu.com/cgi-bin/msg.cgi?call=CALL  (CALL shall be replaced with your callsign)

Sending e-mail via APRS message
Recipient: EMAIL
Text: mail@mail.de SPACE e-mail text

Ordering a weather forecast via APRS message
Recipient: WXYO   
Text: “Callsign-SSID” or Gridlocator “JN58ab” or “current”
(in some regions also WXBOT is working with Text: today tonight tomorrow Monday Tuesday Wednesday Thursday Friday Saturday Sunday)
will send the weather forecast for your last position
Further info and detail explanation for WXYO:

GMA German Mountain Activity APRS Gateway Bot 
with different APRS services like sending a summit spot, looking up the distance between two locators, DX spotting, welcome message when you get to a GMA summit etc. (only for registred callsigns www.cqgma.org)

Recipient:  DL0QW-12
Text: Hallo/Hello (Bot activation)
Text: DK2HM/p DL/MF-012 145.500 fm now qrv  (sending a spot)
Text: qrb jo42ah jo34we (distance between two locator points)

SOTAwatch Cluster Spot via APRS message
(Please register for that service by sending an e-mail to Stewart Wilkinson G0LGS stewart.g0lgs(@)gmail.com)
Recipient: SOTA
Text: DL/MF-010 145.500 FM DK2HM/P Calling Now

SOTA activation APRS-IS announcement and live activation map view

Summit activators that use APRS hf with the Human-Person APRS symbol symbol, will be recognized automatically as activators and the next mountain summit will be marked with the red X APRS symbol symbol on the aprs maps.

Winlink system accessable via APRS
The WINLINK System is completely accessable via APRS message. You can query and have a look at all your winlink mails with this. Please have a look at the detailed how-to information at the above link.
If you add the word WINLINK to your APRS beacon/status text you will be informed automatically via APRS message when a new WINLINK e-mail message is pending for you. 

APRS “fortune teller” Bot 
Recipient: KM6LYW-9
Text: fortune

Repeater info request 
Recipient: REPEAT
‘nearest 2m’ – Find the closest 2m station to my last APRS beacon
‘n’ – Same as above.
‘nearest 2 2m’ – the 2 closest 2meter band stations to my last APRS beacon
‘n 2 2m’ – Same as above.
‘n 3’ – The 3 closest 2meter repeaters. 2 meters is the Default band.
‘n 70cm’ – The closest 70cm station to my last APRS Beacon.
‘n +echolink’ – The closest echolink repeater to my last APRS Beacon.
‘n +echo’ – The closest echolink repeater to my last APRS Beacon.
‘n +dstar’ – find the closest repeater that supports dstar
More info about the service:

QRZ.com query via APRS message
Recipient: WHO-IS
Text: callsign you wish to look up

Position, distance, approach alarm etc. regarding a certain callsign
Recipient: WHERE
Text: callsign
Text: dir (direction) 
Text: dis callsign @km (distance in kilometer)
Text: alert callsign <15km (approaching alarm under 15km distance)
Text: help (shows all available commands)

APRS message groups (if not renewed valid for 12h)
Recipient: ANSRVR
Text: ? (which groups do exist at the moment)
Text: L (which group do I belong to at the moment)
Text: J groupname (join a group, only valid for 12h), K groupname (prolong group membership after 12h), U groupname (unsubscribe group)
Text: CQ groupmame text… (message to all group members)

Post to twitter via APRS message
The message will be automatically posted on the @aprs_twt twitter account. You can use hashtags.
Recipient: TWITR   (alternatively send it to WA1GOV-10, which offers a similar service gateway)
Text: Your text

Sending SMS via APRS message
The APRS to SMS gateway is currently only available in the US, Canada and some other regions.

APRS Voice Alert
Most APRS users set the APRS RX volume normally to zero to avoid hearing the incoming packet data sound all the time. A different way is possible by using the so called Voice Alert, where you set up your APRS RX with CTCSS 123 Hz subtone (Europe: 136,5 Hz) to be silent, but a short analoge voice call with this subtone is possible to get in contact and QSY immediately and not to occupy the APRS frequency. Kenwood radios like the TH-72 or the D700/710 do support this function with a dedicated menu point “Voice Alert” that you can activate in addition to the subtone to continously recieve all APRS pakets, too. More info, section Voice Alert (in German – use Google translate): https://de.m.wikipedia.org/wiki/Automatic_Packet_Reporting_System 

Next transit of the International Space Station ISS or other ham satellites
For detailed Info click on this link: http://aprsisce.wikidot.com/
Recipient: WA1GOV-10
Text: ISS  (also available for other ham satellites see graph below)