这几天一直重新拾起APRS这个通信模式，我上个月与越南美军广播电台工作的老兵进行了交流，突然我恍然大悟我竟然忽视这么完善的通信方式。他不是发坐标的软件！他不是发坐标的软件！他不是发坐标的软件！ 1.什么是APRS. APRS我个人理解为是基于位置系统，让任何联网的设备或者脱网的设备，通过任何的手段不管你是EME也好，卫星转发也好，短波，UV段也好都能通过APRS进行互联互通。这就是标题说的。哦对了APRS还可以发送电子邮件和短信它可以让你实现百元通联全球，或者应急求救的梦想！ 2.有人会问：光听你搁着吹牛你倒是说说这么让这些设备互联互通啊？ 1）APRS网关首先有一个叫APRS网关的东西，它可以把通过无线电接收到的数据包发送到互联网上，也可以把互联网收到的数据包通过无线电传送出去。举个例子： 1.我在安徽我想通过APRS与广州的HAM进行联系。对方使用的设备可能是手台，可能是短波电台。我手里正好有一部联网的手机我通过手机给APRS服务器发消息，APRS服务器会把收到的消息传递给广州ham连接的网关，网关再通过无线电把我的消息传递给他。 2.广州ham：你这不行我周边没有网关啊！我：你手里不是有短波电台嘛! 广州ham：对哦！广州ham通过短波电台联系上了工作再短波频率的远距离APRS网关，我通过联网的手机就可以轻松与他进行联系。 3.读者：你这不行，还要联网的手机。哦忘了说了，即使我没法联网，我还可以通过任何无线电设备联系APRS网关与那位广州HAM进行联系，不论他在天涯海角只要联系上了网关。（无论距离的远近都会有相对应的网关为用户提供连接。卫星也不例外不管你用什么方式） 2）APRS中继 APRS中继：顾名思义他是帮你转发数据包的这个对近距离的UV段非常重要！还是我举个例子：我想用手台通过aprs与广州的ham进行通信，可是我周围还没有网关，但是! 距离我几十公里的徐州还有个APRS中继，距离徐州几十公里还有个淮北APRS中继，距离淮北中继几十公里正好有个网关。这下好办了！! ! 我可以与广州的HAM进行通信了！ APRS有个这个东西WIDEn-n。我把中继路径设置成WIDE2-2，意思就是把我的数据包转发两次。我通过脱网的手台发送数据给徐州APRS中继，徐州的中继收到后把我的数据转发并把我的路径改成WIDE2-1 淮北中继收到徐州发来的数据把数据转发并把路径改成WIDE2-0 网关收到淮北发来的信息，把我的数据上传到互联网互联网再把我的数据给广州ham连接的网关这样我们就可以互相通信了。这个转发不是只可以转发两次它可以让你任意设置，中继收到转发都会递减1，直到递减到0停止转发。如果没有这个设置路径次数，你的数据包会无止境的转发会造成广播灾难。 APRS还可以发送互联网电子邮件和短信，在你紧急的时候可以联系上互联网的家人让你的消息能被很多人收到！说到这可别再把APRS当作发送坐标的软件了。别再错过这么完善好用的通信方式了。关于实现上面说的APRS的软件和设置，看看文章有没有人看吧，理论上篇文章很快就沉了，哎~~~

说复杂了，APRS 本质上就是可以收发的短信，在此基础上，基于不同的文本信息来实现不同的功能，常见的有： 1. 位置共享（最常见的） 2. AFRS（自动频率调整，按照特定的格式编写的话，支持 AFRS 的电台可以直接调整到对应的频率、模式、频差、亚音等，另外也支持数字模式） 3. 状态共享（类似微信朋友圈的那个状态，有下班、正忙等） 4. 依赖 APRS 网关实现的复杂服务（例如：email、SMS 等，逻辑上如果愿意，还可以实现基于 APRS 的求救系统，说白了就是传递字符串） 5. 确认是否在通讯范围，部分电台支持接收到特定规则（比如本机呼号）的 APRS 消息会自动回复，可以实现类似 C4FM 和 D-Star 的通讯范围确认功能 6. 等等简单来说 APRS 就是自动化 + 文本信息，如果配合 APRS 网关，可与实现的功能就更多了，不过这些都是依赖其他的服务。

> @"BH6ABO"#p429 理论上篇文章很快就沉了文章其实没有沉，只是首页的内容，默认按照最新回复排序，如果是最多查看数的话，还是比较靠前的哈😉 [upl-image-preview url=https://storage.hamcq.cn/2022-12-14/1671033969-370524-image.png]

明天得出门文章应该有错别字请见谅

@"BH6ABO"#p429 APRS的SMSGTE目前比较尴尬，没有+86地区的网关，如果想玩这个得买一个美国地区的手机卡。之前也一致研究APRS和APRS-IS相关资料，APRS在有了IS这一层能力后可以拓展很多场景，比如目前的WHOIS服务，可以直接RF->IS->QRZ.com->IS->RF的方式把qrz信息通过无线电发送回来，还是很有意思的

@"BI1NIZ"#p438 我觉得这个放到现在能普及起来就不错了 BA5DX(Lv6注册用户) 17# 业余无线电的Packet通信形成的Net较之民用Internet还早，简单的说是个基于无线的Net，既可以实时通信，传送文件，也可以发送Mail，发布Spot信息，浏览BBS等等。但是那时候好几千的TNC对于工资仅有几张红票票的时代的人来说真的很贵，只是后来互联网越来越发达，然后他就没落了，APRS是牛人后来想出来的基于Packet的新玩法，老瓶装新酒的意味。

APRS-IS有个whois 服务特别有意思，可以发送要查询的呼号，让whois网关通过QRZ查询然后通过IS->RF的方式返回，其实i这样的场景可以扩展很多，但是貌似IS网关不开源，没办法自己拓展这个能力

@"BG6TNB"#p525 老哥说的很精辟，哈哈。本人文笔也不太好 @"[未知用户]"#p530 请问一下这个whois服务怎么使用，发信名称应该怎么填 @"[未知用户]"#p530 请问一下这个whois服务怎么使用，发信名称应该怎么填 @"[未知用户]"#p544 请问一下这个whois服务怎么使用，发信名称应该怎么填

Don't miss this article! APRS breaks down the barriers between devices, a powerful communication method that enthusiasts know about but often overlook.

BH6ABO

I've been revisiting APRS (Automatic Packet Reporting System) communication lately. I recently connected with a veteran who used to work for a Vietnamese military radio station, and it suddenly dawned on me that I had been overlooking such a sophisticated communication method. He wasn't just sending coordinates! He wasn't just sending coordinates! He wasn't just sending coordinates!
1. What is APRS?
In my understanding, APRS is a system based on location services that allows any connected or disconnected device to communicate with each other using various methods, such as EME (Earth-based Mobile Exchange), satellite forwarding, shortwave radio, and the UV band. This is what the title refers to. Oh, and by the way, APRS can also send emails and text messages.
It allows you to achieve your dream of global communication for just $100, or emergency assistance!

2. Someone might ask: But what about actually demonstrating how to connect these devices together?
1) APRS gateway
First, there's something called an APRS gateway, which can send data packets received via radio to the internet, and also transmit data packets received from the internet via radio.
For example:
1. I am in Anhui and would like to contact a HAM in Guangzhou using APRS. Their equipment might be a handheld radio or a shortwave radio.
I have a smartphone with internet access, and I'm sending messages to the APRS server through my phone. The APRS server then forwards these messages to the gateway connected to the Guangzhou ham radio network, which in turn transmits my message via radio to him.

2. Guangzhou Ham: This won't work; I don't have a gateway nearby!
Me: Aren't you holding a shortwave radio?
Guangzhou Ham: Yes, indeed!
Guangzhou Ham was able to connect with a distant APRS gateway using shortwave radio, and I could easily communicate with him through my connected phone.

3. Reader: This won't work; I still need a phone that can connect to the internet.
Oh, I almost forgot to mention this: even if I can't connect to the internet, I can still communicate with the APRS gateway and the HAM in Guangzhou using any wireless device. As long as I can establish a connection through the gateway, no matter where he is (whether it's on the other side of the world), I can contact him. (There will always be a gateway available to provide a connection, regardless of distance. This applies even when using satellite communication.)

2）APRS中继

APRS Relay: As the name suggests, it's a crucial component for UV segments that helps you forward data packets.
Or, let me give you an example:
I want to communicate with a ham radio operator in Guangzhou using my handheld device and APRS, but I don't have any gateways nearby. However!
There's an APRS repeater about 40 kilometers away from me in Xuzhou.
There's a淮北 APRS repeater located about 50 kilometers from Xuzhou.
There's a gateway about fifty kilometers away from Huai North Relay Station.
Now it's easy! I can communicate with HAM in Guangzhou!
APRS has something called WIDE-n. I set the relay path to WIDE2-2, which means that my data packets will be forwarded twice.
I transmit data to the Xuzhou APRS relay using a disconnected radio.
After receiving the message from Xuzhou, my data was forwarded by them, and my path was changed to WIDE2-1.
The淮北中继 received data from Xuzhou and forwarded it, also changing the path to WIDE2-0.
The gateway received information from Huai-bei and uploaded my data to the internet.
If the internet can connect my data to a gateway that's connected to Guangzhou Ham, then we can communicate with each other.
This forwarding feature allows you to configure it to forward multiple times, and it will decrement the count each time a message is forwarded until it reaches zero. Without this setting, your data packets could be endlessly forwarded, leading to a broadcast disaster.

APRS can also send internet emails and SMS messages, allowing you to contact family members online in an emergency so that your message can be received by many people!
And when it comes to this, don't think of APRS as just a software for sending coordinates anymore. Don't miss out on such a comprehensive and useful communication method.

Regarding the software and settings needed to implement the APRS system described above, please check if anyone has already written about it. Theoretically, the article should have been widely discussed by now, but unfortunately, it seems not to be.

BG5UWQ

BH6ABO Theoretically, the previous article sank very quickly.

In reality, the article doesn't "sink" because the content on the homepage is sorted by default based on the most recent replies. If you want to see the most popular articles, they will still appear at the top.😉

BI1NIZ

BH6ABO The current APRS SMSGT is somewhat awkward, lacking gateways for the +86 region. If you want to use it, you'll need to purchase a US mobile phone SIM card. Previously, we have extensively researched APRS and APRS-IS related materials. With the added IS functionality, APRS can be applied in many scenarios, such as the current WHOIS service, which can directly use RF->IS>QRZ.com>IS>Using RF technology, the qrz information can be transmitted wirelessly, which is quite interesting.

BH6ABO

BI1NIZ
I think this would be great if it could be widely adopted now.
BA5DX (Registered user - Level 6)
17#
The amateur radio packet network, which predated the modern internet, was a wireless network that allowed for real-time communication, file transfer, email sending, and BBS browsing. However, at the time, TNCs (transceivers) costing several thousand dollars were very expensive for people earning only a few hundred dollars per month, so the network eventually declined. APRS (Automatic Packet Reporting System), developed later by experts, is a new way to use packet technology, similar to putting old wine in a new bottle.

BG6TNB

说复杂了，APRS 本质上就是可以收发的短信，在此基础上，基于不同的文本信息来实现不同的功能，常见的有：

位置共享（最常见的）
AFRS（自动频率调整，按照特定的格式编写的话，支持 AFRS 的电台可以直接调整到对应的频率、模式、频差、亚音等，另外也支持数字模式）
状态共享（类似微信朋友圈的那个状态，有下班、正忙等）
依赖 APRS 网关实现的复杂服务（例如：email、SMS 等，逻辑上如果愿意，还可以实现基于 APRS 的求救系统，说白了就是传递字符串）
确认是否在通讯范围，部分电台支持接收到特定规则（比如本机呼号）的 APRS 消息会自动回复，可以实现类似 C4FM 和 D-Star 的通讯范围确认功能
等等
简单来说 APRS 就是自动化 + 文本信息，如果配合 APRS 网关，可与实现的功能就更多了，不过这些都是依赖其他的服务。

BH6ABO

BG6TNB What my friend said was very insightful; haha. My own writing skills aren't that great.

[未知用户] Could you please explain how to use this WHOIS service? What should I put in the "sender name" field?

[未知用户] Could you please explain how to use this WHOIS service? What should I enter for the "sender name"?

[未知用户] Could you please explain how to use this WHOIS service? What should I put in the "sender name" field?

BI1NIZ

The APRS-IS system has a "whois" service that is particularly interesting. It allows you to send the call sign you want to query, and the whois gateway will use QRZ to query and then use IS->The RF method returns, and scenarios like this can be extended a lot, but it seems that the IS gateway is not open-source, so I can't expand its capabilities myself.

BH2VLJ

Okay, thank you for the explanation.

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