agsattrack.com

What It Is

AGSatTrack is an online web application for satellite orbit tracking and pass prediction. The page indicates that it makes extensive use of front-end technologies such as Cesium, jQuery, jQuery UI, jQuery EasyUI, and jQWidgets, and provides 3D Earth and 2D map visualization in the browser based on WebGL. It is more of a specialized satellite observation tool than a general-purpose developer platform.

Core Capabilities

In terms of functionality, AGSatTrack supports loading targets by satellite group, selecting specific satellites, updating element data, and offers multiple views including List View, Passes View, 3D View, Polar View, Sky View, Timeline View, and DX View. The 3D view supports 2D, 2.5D, and 3D modes, allows users to choose map providers such as Static Image, Bing Maps, and ArcGIS, and can display terrain, cities, Black Marble layers, skyboxes, frame rate, and mouse latitude/longitude. For observation data, it can show latitude, longitude, altitude, speed, orbit number, visibility, range, range rate, Doppler shift, signal loss, signal delay, azimuth, and elevation, making it quite practical for amateur radio and satellite observation.

Pricing and Licensing

The page does not provide commercial pricing or payment methods. The licensing section shows that the project is Copyright 2012–2017 Alex Greenland and uses the Apache License 2.0; the referenced Cesium component is also described as free for both commercial and non-commercial use. Therefore, it appears to be a free and open-source project, though the page does not provide enough information to determine whether it is still actively maintained.

Pros and Cons

Its strengths are that it covers the core scenarios of satellite observation, offers a rich variety of view types, runs entirely in the browser without plugins, and supports advanced use cases such as browser-based location, manually set observer locations, and Mutual Observer dual-location visibility. Its drawbacks are that the page content is more like interface prompts, with a lack of clear API/SDK, deployment, self-hosting, and developer documentation. There are also multiple spelling errors in the copy, raising questions about engineering maintenance quality and support capability.

Who It’s For and Access from China

It is suitable for satellite observers, amateur radio users, and developers interested in learning how to implement satellite visualization with Cesium/WebGL. The page does not state how well it works from China. Since it may rely on external map services such as Bing Maps and ArcGIS, the actual experience may be affected by network conditions and third-party services. Testing is recommended before deployment or regular use.