Source: https://ham.stackexchange.com/tags/aprs/hot
Timestamp: 2020-07-06 18:25:20
Document Index: 598427895

Matched Legal Cases: ['§97', '§97', '§97', '§97', 'art 15', 'art 15']

Hottest 'aprs' Answers - Amateur Radio Stack Exchange
Hot answers tagged aprs
There's a few parts: §97.109 Station control. (d) When a station is being automatically controlled, the control operator need not be at the control point. Only stations specifically designated elsewhere in this part may be automatically controlled. Automatic control must cease upon notification by a District Director that the station is transmitting ...
There is no rule specific to APRS; the relevant regulations do not care about what mode, protocol, etc. you are using. From §97.113: §97.113 Prohibited transmissions. (a) No amateur station shall transmit: Communications specifically prohibited elsewhere in this part; Communications for hire or for material compensation, direct or ...
I don't know Europe's regulations, but in the US under the FCC's jurisdiction, the onus is on the station operator to prevent unauthorized transmissions. An unlicensed individual using APRS on the internet wouldn't be violating any regulation, but the station operator who allows her station to make prohibited transmissions via the internet would be. ...
Per the spec, which unsurprisingly is found at aprs.org, objects are intended for moving or animate objects of the same nature as a station beacon (people, vehicles, storms, etc.) while items are meant for permanent points of interest (they may come and go, but they're not expected to move) such as hospitals. However, there's no real difference between them, ...
answered Apr 7 at 2:56
Actually, current specifications encourage or require digipeaters to add their callsigns to the WIDEn-N path, since including callsigns greatly helps in finding and fixing all sorts of network issues (look for "traceable" in the page). WIDE1-1 is often replaced by the callsign of a dumb digipeater, WIDE2-1 is usually prepended by the callsign of a digipeater....
My reading suggests that the advantage of AFSK is that the audio signal can be fed to any radio mike input. But if we ignore that, and assume a transmitter where the frequency can be controlled directly, can this be done? Yes, and it is sometimes done for APRS on HF. (This is still "to the mike input", but the radio is doing SSB instead of FM.) From the ...
answered Nov 27 '17 at 18:53
AFSK sent over a FM radio is very different to FSK, as explained in my blog post FM over FSK: FSK over FM is not FSK when you look at the over the air waveform. The spectrum is no longer two tones bouncing back and forth. Assuming you have a FSK modulator that takes 0's and 1's as input, then you will not be able to generate the same signal as AFSK over ...
I've put together something that is conceptually similar to @user3486184's comment, but without actually using chroot. I'm taking advantage of SystemD to manage both direwolf and the subsequent kissattach command necessary to activate an ax.25 interface. I created the following Systemd template unit and installed it into /etc/systemd/system/direwolf@....
When two packets are transmitted simultaneously on the APRS frequency in a local area, it is unlikely that either will be understood. As the packet density in an area increases, the chances that two packets will be transmitted simultaneously increases. This issue is compounded by the presence of digipeaters which can unintentionally flood an area with ...
According to the way things work for simple AX.25 packets, the part after ">" is the destination address. However, the APRS specification commonly repurposes fields, with the goal being to keep the packet as small as possible. The destination field is like that: most APRS packets are broadcast rather than sent to a specific station, so when an APRS packet ...
What you are referring to is known as "Third Party Communications". Here is the blurb from the FCC on third party communications: Section 97.115 of the Commission's Rules, 47 C.F.R. §97.115, authorizes an amateur station regulated by the FCC to transmit a message from its control operator (first party) to another amateur station control operator (...
If the devices are fixed to transmit on amateur APRS frequencies, then you most likely cannot legally use them for business purposes, because that type of use is not allowed on the amateur bands — regardless of the design of the transmitter, the mode, or your license status. Individual countries have different regulations, but there is international ...
When you send something to APRS, even via Internet, it eventually may end up retransmitted on ham radio frequencies. Thus, you are not allowed to use the system if you do not have valid amateur radio license. APRS network requires you to identify using ham radio call sign which you have only if you have valid license.
You may be able to operate the device without consideration of your amateur radio status. CFR 47 Part 15.231 permits the low power use of 433 MHz without a license provided certain transmission repetition rates and maximum field strength rates are met. 433 MHz is commonly used by non-licensed home weather stations under part 15 provisions. If you need to ...
The APRS system and protocol itself doesn't track iGate type or frequency. There is a list of active iGates, but there is no frequency information for them, or for the packets they receive. Further no one appears to maintain a database of such stations. However those that have used it indicate that the coverage is good enough that you really don't need to ...
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