An autonomous orbit determination method for low-orbit satellites using a space-based visible light camera
A technology for autonomous orbit determination and low-orbit satellites, applied in the field of satellite positioning and navigation, can solve complex problems and achieve the effects of long observation arc, high brightness, and high sampling frequency
Active Publication Date: 2020-07-31
NAT UNIV OF DEFENSE TECH
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In order to fully realize autonomous orbit determination, the idea of using X-ray pulsars for orbit determination is also proposed, and the pulse signal of natural stars is used to achieve autonomous orbit determination. However, this method is mainly used in interstellar navigation, and there are still many complicated problems. problem needs to be solved
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[0028] The invention utilizes the tracking information of the high-orbit calibration star to accurately determine the orbit of the observation satellite under the premise that the precise ephemeris of the calibration star and the rough ephemeris of the observation satellite are known. Combined with the invention flow chart, such as figure 2 As shown, the specific implementation is as follows:
[0029] (1) The satellite autonomous orbit determination system is based on all GEO target databases, according to ① whether the existing space target information network can provide accurate ephemeris of the target; ② When the brightness of the target under the sunlight is higher than that of other surrounding targets , Two conditions select GEO calibration target. When the observing satellite loses its precise orbital state information, it can estimate its own rough ephemeris information based on the historical state; when the ground observation equipment is visible to the observing sat...
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The invention relates to a low earth orbit satellite autonomous orbit determination method which comprises the following steps of selecting a plurality of high earth orbit objects (including large space debris) as calibrated satellites to acquire a precise ephemeris of the high earth orbit objects; when a low earth orbit satellite cannot acquire the precise ephemeris, utilizing a boarded space-based visible light camera to point to the high earth orbit calibrated satellites, performing tracking for a period of time to acquire an only angle measurement quantity; utilizing an on-board computer,combining rough ephemeris of the low earth orbit satellite, the precise ephemeris of the high earth orbit objects with the measurement quantity, performing reversed determination to obtain a precise orbit of the low earth orbit satellite. The invention provides a novel satellite autonomous orbit determination way; and when global positioning navigational satellite information cannot be utilized, the novel satellite autonomous orbit determination method can be used as an alternative method. The low earth orbit satellite autonomous orbit determination method provided by the invention is relatively simple in calculation model, fully utilizes space resources and meanwhile, is low in space-based visible light observation cost, small in energy consumption and strong in engineering applicability.
Description
Technical field [0001] The invention relates to a satellite autonomous orbit determination method, in particular to a method for observing a calibration target using a space-based visible light camera carried by a low-orbit satellite and determining its own precise orbit in reverse, belonging to the technical field of satellite positioning and navigation. Background technique [0002] Satellites can rely as little as possible on ground equipment to achieve autonomous orbit determination, which not only has good economic value, but also facilitates satellite management and can better complete corresponding space missions. If low-orbit satellites have no autonomous orbit determination capability, they can only rely on ground equipment to provide them with orbit determination information. Due to their movement characteristics, the time to receive ground equipment measurements is very limited. Therefore, it is necessary to carry out research on autonomous orbit determination technolo...
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IPC IPC(8): G01C21/24
CPCG01C21/24
Inventor 陈磊胡云鹏梁彦刚白显宗
Owner NAT UNIV OF DEFENSE TECH