Spinning stabilization weather satellite scanning synchronizer

Abstract

The invention discloses a spinning stabilization weather satellite scanning synchronizer. The synchronizer comprises a reference selection circuit, a simulated phase-locked frequency multiplication circuit, a beta angle compensation pulse generation and correction circuit, a beta angle accumulation error correction circuit and a synchronous control signal generation circuit. The reference selection circuit comprises a filter, a shaper and a one-out-of-four simulation switch. The simulated phase-locked frequency multiplication circuit comprises a phase-locked loop, a loop filter and a 216 frequency divider. The beta angle compensation pulse generation and correction circuit comprises a crystal oscillator, a 223 frequency divider, a monostable trigger and an OR gate chip. The beta angle accumulation error correction circuit comprises a 24 frequency divider, a time delay device, an RS trigger, an AND gate chip and a one-out-of-two simulation switch. The synchronous control signal generation circuit comprises a 12-bit binary-system serial counter, a decoder, and a driving chip. In the invention, the rapid locking of an ultralow frequency input signal is realized, high stability duringworking can be ensured, a pulse compensation function is easy to realize and high compensation precision is guaranteed.

Description

technical field [0001] The invention relates to a scan synchronizer, in particular to a spin-stabilized meteorological satellite scan synchronizer. Background technique [0002] For meteorological satellites whose attitude control is spin-stabilized and operating in geostationary orbit, their main task is to obtain meteorological cloud images in a timely and accurate manner, and to complete the earth remote sensing observation task. The main detection instrument of the satellite is the scanning radiometer. The acquisition of the meteorological cloud image relies on the scanning radiometer's telescope tube to scan the earth's east and west directions in the instantaneous field of view with the rotation of the satellite star, and relies on the stepping of the scanning radiometer lens itself to achieve south and north coverage. In order to obtain a clear picture of the cloud image, it must be ensured that the scanning radiometer lens can accurately capture images of the target...

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Problems solved by technology

[0003] At present, there is no description or report of the similar technology of t

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