4 results about "Occultation" patented technology

This application discloses a one-dimensional variational inversion method and apparatus for GNSS occultation data. The method includes background field preparation: interpolating temperature, air pressure, and water vapor pressure from the grid field to the latitude and longitude of the occultation data; simultaneously, interpolating the liquid water content and ice water content in the clouds to the latitude and longitude of the occultation data to obtain the background field profile required for inversion; and inputting observation data and background field: inputting the occultation data, background field profile, observation error covariance matrix, and background field error covariance matrix into the one-dimensional variational inversion system. By adding liquid water content and ice water content terms to the observation operator, the deviation between the observation data and the background field data is calculated, and the distribution characteristics of the deviation are statistically analyzed. After adding liquid water and ice water, the average refractive index deviation between the two types of data is significantly reduced.

The invention relates to a pose measurement and control method of a distributed external shielding planet observation system, and belongs to the field of space astronomical telescopes. The method comprises the following steps: performing primary satellite and secondary satellite formation setting on a telescope; performing relative translation coarse alignment on the primary satellite and the secondary satellite; performing focal length precise adjustment on the primary satellite and the secondary satellite; performing three-dimensional attitude precise alignment on the primary satellite and the secondary satellite; the star shielding cover is arranged between the telescope and the interference fixed star, and the positions and poses of the star shielding cover and the telescope are adjusted. According to the invention, micron-level relative attitude determination and synchronization, centimeter-level formation flight control and arc-second-level measurement resolution can be realized.

The invention relates to the technical field of occultation observation, and discloses an occultation atmospheric bending angle observation error confirmation method. The confirmation method comprises the following steps: obtaining an occultation atmospheric bending angle in occultation data, and a first meteorological data set and a second meteorological data set which correspond to an occultation profile in the occultation data and are not derived from the current occultation; determining a first atmospheric bending angle according to the first meteorological data set, and determining a second atmospheric bending angle according to the second meteorological data set; obtaining a first bending angle error between the occultation atmospheric bending angle and the first atmospheric bending angle, a second bending angle error between the occultation atmospheric bending angle and the second atmospheric bending angle, and a third bending angle error between the first atmospheric bending angle and the second atmospheric bending angle; and determining obscuration atmospheric bending angle observation errors through a formula. By adopting the confirmation method, the objectivity of the observation error can be improved. The invention further discloses a device for confirming the obscuration atmospheric bending angle observation error and a using method.

The application relates to the technical field of occultation observation, and discloses a method for confirming an observation error of an occultation atmospheric bending angle. The method comprises the following steps: obtaining an occultation atmospheric bending angle in occultation data, and first and second meteorological data sets corresponding to an occultation profile in the occultation data and not derived from a current occultation; determining a first atmospheric bending angle according to the first meteorological data set, and determining a second atmospheric bending angle according to the second meteorological data set; obtaining a first bending angle error of the occultation atmospheric bending angle and the first atmospheric bending angle, a second bending angle error of the occultation atmospheric bending angle and the second atmospheric bending angle, and a third bending angle error of the first atmospheric bending angle and the second atmospheric bending angle; and determining the observation error of the occultation atmospheric bending angle through a formula. The method can improve the objectivity of the observation error. The application also discloses a device for confirming the observation error of the occultation atmospheric bending angle and a use method.