Hacking a Secondhand Marine Satellite Dish to Track Satellites with Gpredict
好的,我现在需要帮用户总结一篇文章的内容,控制在100字以内。用户已经提供了文章和示例回复,我得先仔细阅读文章内容,抓住关键点。 首先,文章讲的是Melan和Alex他们如何逆向工程一个二手的Intellian i4卫星天线。这个天线新的价格大约4000欧元,但他们只花了200欧元买到。天线本身是40厘米的主焦点设计,有四个LNB,还有强劲的步进电机和一个带有DBT技术的电动副反射器。 接下来,他们遇到了问题:这个天线通常需要从船上的NMEA 0183通过RS-422获取航向数据。因为他们在陆地上使用,所以用RP2040和TTL-to-RS-422模块伪造了$HCHDG罗盘信号。为了摆脱Intellian的Aptus软件依赖,他们反编译了C#应用,解析了ACU的文本串行协议,并写了一个中间件让天线看起来像一个普通的旋转器给Gpredict用。最后他们把天线放在荷兰NURDspace黑客空间的屋顶上接收Ku波段卫星电视。 总结的时候要抓住主要信息:逆向工程、低价购买、硬件规格、解决通信问题、软件逆向、集成到Gpredict以及实际应用。控制在100字以内,直接描述内容,不需要开头语。 可能的结构:Melan和Alex逆向工程了一个二手Intellian i4卫星天线(价格对比),详细描述硬件配置。他们解决了通信问题(伪造信号),反编译软件协议,并集成到Gpredict,在NURDspace屋顶接收卫星电视。 现在把这些要点浓缩成简洁的一段话。 </think> Melan 和 Alex 逆向工程了一台二手 Intellian i4 海事卫星天线(新价约 €4,000,二手购入仅 €200),并成功将其改装为 Ku 波段卫星电视接收器。该设备配备 40 cm 主焦点设计、四 LNB 和动态波束倾斜技术。通过 RP2040 模块伪造 NMEA 数据,并反编译软件协议使其兼容 Gpredict,在荷兰 NURDspace 屋顶实现卫星电视接收。 2026-4-22 03:42:38 Author: www.rtl-sdr.com(查看原文) 阅读量:10 收藏

Thank you to Melan / Alex for submitting news about their project, where they reverse-engineered a second-hand Intellian i4 marine satellite dish, which retails new for around €4000 but which they picked up second-hand for about €200. The dish itself is a 40 cm prime-focus design with a quad LNB, beefy stepper motors, and a motorized sub-reflector implementing Intellian's Dynamic Beam Tilting (DBT) technology, where the small sub-reflector handles fast beam corrections so the main motors only deal with large movements.

The dish normally expects heading data from the boat via NMEA 0183 over RS-422, so Melan solved the "we're not on a boat" problem with an RP2040 and a TTL-to-RS-422 module spoofing $HCHDG compass sentences to the Antenna Control Unit. To avoid being tied to Intellian's Aptus software, they decompiled the C# application to reverse engineer the ACU's text-based serial protocol. They then wrote a shim making the dish appear as a generic rotator to Gpredict, and put it on the roof of Dutch hackerspace NURDspace, pulling in Ku-band satellite TV. 

The full write-up includes photos of the internals, an auto-generated protocol document, and a video of the dish doing a test dance.


文章来源: https://www.rtl-sdr.com/hacking-a-secondhand-marine-satellite-dish-to-track-satellites-with-gpredict/
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