Method and device for calibration of digital celestial sensor
US7822572B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2008 |
| Grant date | Oct 26, 2010 |
| Priority date | — |
| Expiry date | Feb 15, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64G1/363
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method for calibration of a digital celestial sensor is disclosed. First, an integrated mathematic model for imaging of a celestial sensor is established according to external and internal parameters of the calibration system of the celestial sensor. Second, by rotating two axes of a rotator by different angles, calibration points data are acquired and sent to a processing computer through an interface circuit. Finally, a two-step calibration program is implemented to calculate the calibration parameters by substituting calibration points' data to the integrated mathematic model. An application device of the calibration method is also provided. The device may include a celestial simulator to provide simulated sunlight or starlight, a two-axis rotator to acquire different calibration points' data, and a processing computer to record the calibration points' data and calculate the calibration parameters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.