整理一下我的折腾过程。参考 @"BG7ZDQ"#1562 与 BH3TZB 的教程。感谢 @"BD1BGB"#8033 群内指点。系统：Windows11，设备：RTL-SDR-V4 链接： [原文章](https://sway.cloud.microsoft/PpOFcASKXMlOJNRQ?ref=Link&loc=play) [网盘](https://1drv.ms/f/c/a7c3226f3f26758d/Eu6cZ-zqR9pOll54FyFmgX4BcsO14ehxuyQgCw6y0rBLwA) 部分资源需要特殊的上网技巧。部分可执行文件会被误报为病毒，请看管好您的安全中心。我上传的文件在 [OneDrive](https://1drv.ms/u/c/2e3ab460ef1798fe/EfSfhysNfVhLtbcly4src3kBuOKPlYraEhSn5zvELAYPVw?e=6nyQ0o) 下面正式开始。 1. 在 [RTL-SDR Github](https://github.com/rtlsdrblog/rtl-sdr-blog/releases) 处下载驱动，并自行安装。安装方式可以参考 [官方文章](https://www.rtl-sdr.com/V4/) 2. 下载并安装 **2021.07.27版本的Radioconda** 。 [Github下载](https://github.com/ryanvolz/radioconda/releases/download/2021.07.27/radioconda-2021.07.27-Windows-x86_64.exe) 。安装有几点要注意，第一 **记住安装位置** ，后面要用；第二本体比较大，请预留 **4GB** 空间。安装会在一个进度上停留得稍微久一点，请耐心等待。安装过程中出现cmd窗口属正常现象。 3. 下载 **patch_gr-lilacsat_gr-dslwp.zip** 文件，解压打开之后里面是 **Lib** 和 **Library** 两个文件夹，包含了解码要用到的相关库。复制进 **radioconda的安装目录** ，与目录中原有文件夹 **合并** 。 4. 下载 **proxy_mmt_gui.zip** 并解压打开，先修改 **config.cfg** ， **proxy_nickname** 改成呼号， **proxy_long** 填写经度， **proxy_lat** 填写纬度， **proxy_alt** 填写高度。记得都是小数，不能省去小数点。修改完成之后保存，运行exe，会出现一个cmd窗口。 5. 连接SDR设备 6. 从 [这里](https://asrtu.mqsi.xyz/latest.txt) 获取最新星历，并填入 **asrtu-1_tle.txt** （这个文件跟grc文件保持在同级目录下），然后从开始菜单运行GNU Radio Companion。 7. 打开 **demod_asrtu-1_rtlsdr.grc** ， **别管那个爆红的import** ，然后打开 **ASRTU-1.exe** 并按照说明修改 **demod_asrtu-1_rtlsdr.grc** ，先Run->Execute一下然后关掉GNU Radio Companion，找到你之前下载的RTL驱动，里面有 **rtlsdr.dll** 和很多以 **rtl_** 开头的 **exe** 文件，复制进 **radioconda安装路径\\Library\\bin** 里面，替换掉原有文件。 8. 再次打开GNU Radio Companion并打开 **demod_asrtu-1_rtlsdr.grc** ，修改 **Plan13 CC** 块中的经纬高，Execute，保持 **ASRTU-1.exe** 运行并连接了本地的数据服务器。这样应该就搭建完成接收环境了。微调 **rf_gain** 以达到更好的接收效果。不知道卫星什么时候开始下发信号，30日早晚各有一次过境，但是晚上那次仰角很低（GRID OM92）。只是成功搭建了环境，不知道能否成功接收信号。

早上过境好像没有开始下传信号，等晚上过境。patch_gr-lilacsat_gr-dslwp.zip、proxy_mmt_gui.zip、demod_asrtu-1_rtlsdr.grc、ASRTU-1.exe直接找我上传的安装包。第七步要替换的驱动就在第一步里面下载的Release.zip里面。

实时解码还是有点太麻烦了，还是录制基带然后再后期解码吧

@"BI3SVM_Rinko"#p84220 应该可以走另一个audio的grc

ASRTU-1.exe 是怎么来的，我系统上打不开这玩意

@"BI7BST"#p84280 开发者拿易语言写的，会被报毒，要去安全中心或杀毒软件解

@"BG4QBF"#p84285 我Linux……那看来要再找找别的软件了

@"BI7BST"#p84301 兄台留步，openwebRX了解一下，还有GQRX

@"BI7BST"#p84301 哈哈，我是双系统，就用win折腾了 :P

@"y010204025"#p84306 openwebrx怎么搞呢，我倒是真有一套这个，没看到这个在哪有解SSDV的选项

Setup: RTL-SDR receiver and SSDV software environment for the Astroid Friendship (SSDV)

BG4QBF

Let me summarize my process of experimentation. Reference: @BG7ZDQ Following the tutorial from BH3TZB. Thank you. @BD1BGB Suggestions from within the group.
System: Windows 11, Device: RTL-SDR-V4
Link: Original article Cloud storage
Some resources require specific internet skills.
Some executable files may be falsely identified as viruses; please ensure your security center is properly configured.
The files I uploaded are in OneDrive

Let's begin now.

In RTL-SDR GitHub Download and install the driver yourself. You can refer to the installation instructions for guidance. Official article
Download and install RadioConda version 2021.07.27 。 Download from GitHub 。 There are a few things to keep in mind during installation, first Please remember the installation location. , which should be used later; the second body is quite large, so please make sure to allocate enough space. 4GB Space. The installation will take a slightly longer time to complete, so please be patient. It's normal for a cmd window to appear during the installation process.
Download patch_gr-lilacsat_gr-dslwp.zip The file, after being unzipped and opened, contains: Lib And Library Two folders, containing the relevant libraries needed for decoding. Copy them in. The installation directory for radioconda , along with the existing folders in the directory. Merge 。
Download proxy_mmt_gui.zip And then extract it and open it, first make modifications. config.cfg ， proxy_nickname Change to call sign. proxy_long Enter the longitude. proxy_lat Enter latitude. proxy_alt Enter the height. Remember that it should be a decimal number, and you cannot omit the decimal point. After making the changes, save them, run the exe file, and a cmd window will appear.
Connecting SDR devices
From Here Obtain the latest ephemeris and fill it in. asrtu-1_tle.txt (This file should be in the same directory as the grc file), then run GNU Radio Companion from the Start Menu.
Open demod_asrtu-1_rtlsdr.grc ， Ignore that hugely popular "import" thing. Then, open it. ASRTU-1.exe And modify according to the instructions. demod_asrtu-1_rtlsdr.grc , first run->Run it and then close GNU Radio Companion. Find the RTL driver you previously downloaded, which contains... rtlsdr.dll And many of them RTL The beginning exe File, copy to radioconda installation path\Library\bin Replace the existing file with the new one.
Open GNU Radio Companion again. demod_asrtu-1_rtlsdr.grc , modify Plan 13 CC The coordinates in the block are high, Execute, maintain. ASRTU-1.exe The local data server has been set up and connected. This should complete the environment for receiving data. Fine-tuning. rf_gain To achieve better reception.

I don't know when the satellite started transmitting signals. There were two passes on both the morning and evening of the 30th, but the second pass in the evening had a very low elevation angle (GRID OM92). I was only able to set up the environment, but I wasn't sure if I would be successful in receiving the signal.

BG4QBF

It seems that the transmission didn't start when passing through this morning. We will wait until evening to pass through. The following files can be downloaded directly from the installation package I uploaded: patch_gr-lilacsat_gr-dslwp.zip, proxy_mmt_gui.zip, demod_asrtu-1_rtlsdr.grc, and ASRTU-1.exe. The driver to replace in step seven can be found in the Release.zip file downloaded in step one.

BI3SVM_Rinko

Is real-time decoding too complicated? Or should I record the raw signal and decode it later?

BG4QBF

BI3SVM_Rinko It should be possible to use another audio GR.

bg5axs

Thank you for sharing. Building in progress.

BI7BST

I don't know how ASRTU-1.exe came to be on my system, and I can't open it.

BG4QBF

BI7BST The code was written in Easy Language and will be flagged as malware. It needs to be removed by a security center or antivirus software.

BI7BST

BG4QBF I'm using Linux... so I guess I need to look for other software.

y010204025

BI7BST Excuse me, could you please explain openwebRX and GQRX?

BG4QBF

BI7BST Haha, I'm running dual systems and have been messing with Windows :P

CR400BF-GZ-5214

BI7BST You can directly use the Live CD system, burn the ISO image to a USB drive, or follow a data persistence tutorial from a cloud storage service like Netdisk. Remember to also update your star calendar settings.

BI7BST

BI7BST Self-answering: I found a method for decoding on Linux systems that completely relies on Linux, without using Windows/wine/LiveCD, in this post. Next time there's an SSDV event, I will try to use the method described in this post to receive and decode the signal (or if anyone else has recorded the complete IQ signal, please send it to me so I can try it out).

https://community.libre.space/t/ssdv-fm-rs64s-asrtu-1/12729/19

BI7BST

y010204025 How do I use openwebrx? I actually have a working version of this, but I haven't found any options for it to handle SSDV.

y010204025

BI7BST I asked an AI about this, and it confirmed that SDR can acquire audio streams, which is possible. Then, you would need to use the appropriate decoding software.

BI7BST

y010204025 Asking AI is essentially pointless... it's all about the decoding software.

BI7BST

CR400BF-GZ-5214 I also need to integrate some other components here. I'm wondering how a live CD is created, rather than using a simple package.

y010204025

BI7BST In that case, we'll have to revert to Windows.

BI7BST

y010204025 Ugh, I really don't want to mess with Windows. Although, I haven't received any satellite signals lately either, so I'll look into it again when I have time.

y010204025

BI7BST I just remembered that I could try running a wine business and see if it's feasible.

BH5UNT

Can it be understood this way:
The SDR receives the baseband signal and uses the VB Cable to transmit the audio to a BPSK demodulation program built in GNU Radio, which is represented by a flow chart. The resulting binary stream is then forwarded to an SSDV or telemetry beacon decoding tool written by BG6LQV via a UDP proxy (proxy\_mmt\_gui).

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