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Jitian Xingwen | Non orbital one-time transit curve imaging technology changes the traditional observation method of satellite remote sensing, making emergency relief faster!
2025-03-27
Suzhou No.1 Satellite (Jitian Star A-03) and Jilin University No.1 Satellite (Jitian Star A-01) are the new generation of optical remote sensing experimental constellations independently developed by Jitian Xingzhou. The satellite is equipped with an independently developed "high timeliness, high geometry, high spectrum" optical camera, which has conventional and dynamic imaging capabilities. The ground panchromatic, multispectral, and hyperspectral resolutions are 3m, and the width is 15km.
In March 2025, large-scale wildfires broke out in the southeastern regions of South Korea, including Shanqing County, Hedong County, Yicheng County, Ulsan Metropolitan City, and Jinhae City, with a burned area exceeding 14700 hectares. As of March 26, 2025, wildfires have caused 22 deaths (source: CCTV News).
On March 25, 2025, the SuSuSu-1 satellite (JiTianXing A-03 satellite) successfully obtained high-definition images of the Shanqing County wildfire in Gyeongsangnam do using non orbital transit curve imaging technology, providing a new perspective for disaster assessment with visible light multispectral data at a resolution of 3m. The remote sensing image shows that the suspected fire point is about 400m away from the nearest residential area, and the reservoir that can be used to extinguish the mountain fire is about 3km away from the suspected fire point. The following is an overview of the imaging process:
Figure 1 Overview of Non Rail Transit Curve Imaging
The following is a partial map of the mountain fire in Sanqing County, Gyeongsangnam do:
Figure 2: Remote Sensing Image of Mountain Fire in Sangcheon gun, Gyeongsangnam do, South Korea
The non orbital one-time transit curve imaging technology breaks through the limitations of traditional strict imaging along the orbital direction, enabling satellites to image along the direction of any curved target (arc, S-shape, etc.), achieving efficient observation of linear targets such as key watersheds, pipelines, roads, borders, and coastal zones, and improving the comprehensive imaging efficiency of remote sensing satellites by an order of magnitude. Jitian Double Star is the only satellite with non orbital one-time transit curve imaging technology that can be industrialized and operated commercially, ranking at the international advanced level!
The conventional push scan mode requires multiple shots to capture all images of multiple dispersed targets, rather than the single transit curve imaging technology along the track that can achieve multiple targets in one transit. The imaging target of this project is not only to target the core area of the Korean wildfire, but also to simultaneously obtain high-definition images of multiple islands near Taiwan Province. The task time is significantly reduced compared to the conventional push scan mode, which confirms the unique advantages of this technology in wide area emergency monitoring.
This imaging covers suspected wildfire sites in Sangcheong gun, Gyeongsangnam do, South Korea
(Longitude and latitude: 127.8513486 ° E, 35.2179394 ° N)
Islands near Taiwan Province
(latitude and longitude: 122.9946768 ° E, 24.4554467 ° N),
The imaging strip length is 1320km and takes 188s.
If using the conventional push scan mode for observation, it is necessary to plan at least 2 transit observation tasks, which will take two days or more overall. The non rail transit curve imaging technology has significant advantages in observing targets in long strips.
