FIELD: measuring equipment.
SUBSTANCE: method for determining the position of the front part of a glacier from a near-circular orbit includes determining the current orbital parameters, surveying the glacier and stationary indicative ground points from the SC at the moments taken in a given time interval, and determining the speed of the front part of the glacier from the images obtained. In addition, the SC orbit is adjusted, changing its height in the selected limits to a value based on the value of the latitude argument us of the orbit subsolar point at the beginning of the glacier's ablation season. Since the beginning of the glacier ablation season, the glacier and stationary indicative points around the glacier are surveyed at the moments, taken in the specified time interval, selected from the determination condition of displacement of the glacier front part based on the obtained images. Then the survey of the glacier and stationary indicative points around the glacier is performed in regular intervals, counted off from the moment of the previous survey of the glacier and starting with the current time, forecast based on the obtained images and in which the front part of the glacier will move by the distance, equal to the angular resolution of the SC survey system, multiplied by the height of the orbit, and ending with the current time, forecast based on the obtained images, until the front part of the glacier reaches the specified ground point, reduced by the specified time for preparatory operations before the front part of the glacier reaches it. The obtained images determine the distance from the indicative ground points to the front part of the glacier, based on which the speed, acceleration and the acceleration derivative of the front part of the glacier are determined.
EFFECT: formation of a near-circular orbit of the spacecraft to determine the parameters of the glacier's displacement, starting from the beginning of the glacier's ablation season.
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