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    Star Sensitive Data Service

    Star Sensitive Data Service offers on-orbit observation data products of spacecraft. Through continuous processing of on-orbit observation information, it records the state changes of the target in the space reference system in sequence data, featuring continuity and high precision, reflecting the dynamic change trends during operation. The data is output in a standardized format, providing data support for the operation analysis of spacecraft.

    Contact and Cooperation

    The product is about to be launched. We welcome data users and providers to contact us by phone or email to discuss cooperation matters.

    Core Characteristics of Star Sensor Data

    As the most accurate attitude measurement instrument for spacecraft, star sensors provide fully autonomous attitude determination capabilities.

    🎯

    Extremely High Precision

    The attitude measurement accuracy of modern star sensors can reach the arcsecond level (<5 arcseconds), making them one of the most precise attitude measurement instruments, providing an accurate attitude reference for spacecraft.

    High precision Arcsecond level High reliability
    🌐

    Full autonomy

    It does not rely on any ground stations or external signals and can operate solely by observing natural stars. It has strong anti-interference capabilities and is an indispensable autonomous navigation device in deep space exploration.

    Autonomy Anti-interference Applicable to deep space
    ⚡

    Real-time data output

    From exposure to outputting attitude results only takes tens to hundreds of milliseconds, which can provide real-time attitude feedback for spacecraft control systems.

    Real-time Millisecond level Rapid response
    📊

    Multi-source Data Fusion

    Output includes multi-level information such as raw star point data, engineering data, and health status data, supporting ground diagnosis and algorithm verification.

    Multi-source fusion Multi-level Verifiable

    Star sensor data processing flow

    A complete data chain from raw star images to precise attitude information

    1

    Data extraction

    Extracting the pixel coordinates (X, Y) and estimated magnitudes of star points from raw star images to generate a star point list

    Input data Raw star image
    Output data Star point list (coordinates + magnitudes)
    2

    Image recognition

    Comparing the observed star patterns with the built-in navigation star library to determine the celestial star ID corresponding to each observed star

    Input data Star point list (coordinates + magnitudes)
    Output data Recognition result (star ID)
    3

    Attitude determination

    Using the optimal estimation algorithm to calculate the attitude quaternion or direction cosine matrix to describe the rotational relationship of the spacecraft relative to the inertial coordinate system

    Input data Recognition result (star ID)
    Output data Attitude quaternion/matrix
    4

    Data generation

    Generating auxiliary information such as data status flags, timestamps, and confidence levels to indicate data validity and observation quality, and extracting observation target data

    Output data Status flag, timestamp, target data

    Space Mission Applications

    Star sensor data plays an irreplaceable core role in space missions

    🎯

    High-Precision Attitude Reference

    Provides stable pointing for Earth observation satellites and astronomical telescopes, ensuring clear images and accurate positioning

    🔧

    In-Orbit Sensor Calibration

    Serves as a 'truth' reference, periodically calibrating the drift error of gyroscopes and correcting the installation matrix errors of other sensors

    🎮

    Attitude Maneuver Control

    Provides real-time and precise attitude feedback during satellite orbit changes and attitude adjustments, ensuring accurate maneuvers

    🔬

    Scientific Exploration Support

    High-precision attitude data itself is also part of scientific achievements, used to assist in analyzing the orbit and pointing of detectors

    Usage Limitations and Precautions

    Understand the working limitations of star sensors to ensure the validity and reliability of data

    ☀️

    Susceptible to Strong Light Interference

    The field of view cannot be illuminated by strong light sources such as the sun, Earth, or moon, otherwise it will cause the star sensor to 'blind'

    🧭

    Requires Initial Attitude

    A rough initial attitude (which can be provided by other sensors) is needed for the first startup or when the attitude is completely lost to complete star map recognition

    ⏱️

    Computational Delay Exists

    There is a certain processing time from exposure to outputting attitude results, usually ranging from tens to hundreds of milliseconds

    Star Sensor Data Display

    The following provides several typical examples of star sensor raw data

    Star Sensor Working Diagram
    1
    Star Map Recognition and Matching
    2
    Attitude Determination and Calculation
    3
    Attitude Control and Application
    4

    Why Choose Us

    🎯

    Professional Data Processing

    Advanced star map recognition algorithms and attitude determination algorithms are adopted to ensure the high precision and high reliability of the data.

    🔗

    Multi-domain Application

    The data is applicable to multiple fields (defense, scientific research, business), providing easily integrated API interfaces to meet the customized needs of different customers.

    ✅

    Reliable Service Guarantee

    We offer stable data updates and strong technical support to ensure that customers receive continuous and efficient service throughout their usage.

    Start your journey with Star-sensitive Data

    Contact us to provide professional Star-sensitive Data service solutions for data users; data owners can upload Star-sensitive Data and share the value benefits of the data.

    Contact and Cooperation