[OZAPRS] Fill In Digi needed

Thu Nov 9 18:08:49 AEDT 2017

Some information here: https://amsat-uk.org/2011/10/28/aprs-pass-predictor/

Too long; didn't read (tl'dr) version: Send a message (containing anything,
even blank) to 'ISS', and if you've beaconed a position recently, a message
will be sent back to you via APRS-IS giving you the next pass info. Similar
for some other satellites.

WARNING: These services will respond to ACKs from your radio. So Kenwood
users had better disable auto-acking else you end up in a loop of message /
response :-)

73
Mark VK5QI

On Thu, Nov 9, 2017 at 3:05 PM, Matthew Cook <vk5zm at bistre.net> wrote:

> That's interesting, how are you generating the messages from home or the
> car or something ?
>
> 73
>
> Matthew
> VK5ZM
>
> On 8 November 2017 at 19:14, Peter Wicklein <vk3tbn at hotmail.com> wrote:
>
>> I use APRS messaging for next AOS of next APRS sat at my current location
>> when portable and traveling light. Works well.😀
>>
>>
>>
>> Sent from my Windows 10 phone
>>
>>
>> ------------------------------
>> *From:* OZAPRS <ozaprs-bounces at aprs.net.au> on behalf of Matthew Cook <
>> vk5zm at bistre.net>
>> *Sent:* Tuesday, November 7, 2017 4:44:58 PM
>> *To:* Australian APRS Users
>> *Subject:* Re: [OZAPRS] Fill In Digi needed
>>
>> Yes RX iGates "can" break two-way messaging, but only in certain
>> circumstances.
>>
>> We lost a very good Wide2 digi that covered the Adelaide plains here in
>> VK5 a while back and as a result there are now black spots where APRS
>> messaging no longer works.
>>
>> To make it worse there is a RX only iGate that has a good shot into that
>> area, so it picks up the message fires it back into APRS-IS only to
>> reappear via our internet->rf gateway...  the issue is when you reply over
>> RF it goes no where.  You've got to check the path to work out if it's
>> worth while.   Turning that RX only iGate into a digi to aleviate the issue
>> is not a good idea since there are three WIDE2's within cooeee of that area
>> so the forth will do nothing but create congestion.  Catch 22.  One day we
>> may find a site to replace the one we lost.
>>
>> With respect to messaging many of us used to take advantage of the QSY
>> feature of our kenwoods (it tells you where other stations are listening),
>> so when the local repeater was busy I could message others to QSY to an
>> adjacent repeater without breaking in and QSY-ing on the first repeater.
>> With the holes in the messaging network this has proven harder.
>>
>> Anyway that is the only negative, we have a plethora of RX only iGates
>> around here now days, so it's interesting to see how things change.
>>
>> 73
>>
>> Matthew
>> VK5ZM
>>
>> On 7 November 2017 at 15:32, vk2tv <vk2tv at exemail.com.au> wrote:
>>
>>> I'm not voting either way on rx only igates. Some scribes on a US aprs
>>> list claim they break messaging but what's the experience in the land of
>>> Oz? I've personally found aprs messaging to be useless; maybe others have
>>> used it with success. Just asking out of curiosity.
>>>
>>> Ray vk2tv
>>>
>>> On 07/11/17 14:56, Matthew Cook wrote:
>>>
>>> Hi Bob,
>>>
>>> There is nothing wrong with using a WIDE1-1 to fill in a local area,
>>> ideally you want your fill-in digi to hit VK2HIM.  The whole point of a
>>> WIDE1-1, is to pick up local stations and throw them up to the WIDE2's for
>>> distribution.  Once upon a time they were called RELAY's, until the new
>>> WIDEx-n paradigm came into effect.
>>>
>>> Your RX only iGate wont cause problems, APRS-IS removes dupes server
>>> side *before* distribution.
>>>
>>> I'd +1 APRX as Scott has suggested, you might like to search Owen
>>> VK1OD's website for information on what he worked on previously.  There are
>>> some fixes to APRX's digi system that are well worth the effort (
>>> https://github.com/owenduffy
>>> <https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fowenduffy&data=02%7C01%7Cvk3tbn%40hotmail.com%7C9173ea305b034e95b27a08d525a2b453%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636456303099284737&sdata=nU4SfB9zV7yTCY5Knjg3Xeta7tkccwNVt1T78qLpHOY%3D&reserved=0>
>>> ).   I've been running a rPi RX Only iGate here in VK5 for the past 5
>>> or so years, they work well.
>>>
>>> YMMV.
>>>
>>> 73
>>>
>>> Matthew
>>> VK5ZM
>>>
>>> On 7 November 2017 at 13:28, Bob <vk2byf at gmail.com> wrote:
>>>
>>>> Hi
>>>>
>>>> I'm Bob, VK2BYF, in Nowra
>>>>
>>>> Having lost our local digi some years ago and our local ham population
>>>> being very sparse we seem to have dropped off the APRS map.
>>>>
>>>> My Tiny Track in my motor vehicle can't be heard by the nearest Digi,
>>>> VK2HIM near Gerringong, until I gain some altitude.
>>>>
>>>> To get myself back on the APRS map I decided to build a RX only Igate
>>>> using a Raspberry Pi, RTL-SDR & direwolf which seems to work ok.
>>>>
>>>> I experimented with a laptop running direwolf, KA2DDO's YAAC and a
>>>> FT-817 as a fill in digi, Wide 1-1, which also seem to work ok.
>>>>
>>>> The next phase was going to be to setup a RF digi using a cheap Chinese
>>>> VHF/UHF Radio to fill in the local RF hole we have here in the Bomaderry,
>>>> Nowra area.
>>>>
>>>> Knowing very little about APRS but the basics and having been
>>>> monitoring this forum for a while, I have more questions than answers.
>>>>
>>>> A wide 1-1 to fill a local hole is that rite or wrong?
>>>>
>>>> RX only IGate to fill a local RF hole, Is this going to cause problems?
>>>>
>>>> Should I even bother to build a proper RF in and out digi?
>>>>
>>>> What is the best configuration just to fill in a local RF hole and get
>>>> a fair section of the Princes highway back on the map?
>>>>
>>>> BTW I prefer to run things on Linux. YAAC, a java applications work
>>>> very nicely on Linux.
>>>>
>>>> Regards Bob vk2byf
>>>>
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>>>>
>>>
>>>
>>>
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>>
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>
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