en:sun_subsys

# Differences

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 en:sun_subsys [2019/09/16 15:38]golikov en:sun_subsys [2019/09/16 15:54]golikov Both sides previous revision Previous revision 2020/01/20 09:38 golikov 2019/09/16 15:54 golikov 2019/09/16 15:53 golikov 2019/09/16 15:38 golikov 2018/01/22 17:51 ashley 2018/01/22 17:29 ashley 2017/12/01 13:33 writer 2017/12/01 13:32 writer 2017/12/01 13:32 writer 2017/11/21 22:00 writer created Next revision Previous revision 2020/01/20 09:38 golikov 2019/09/16 15:54 golikov 2019/09/16 15:53 golikov 2019/09/16 15:38 golikov 2018/01/22 17:51 ashley 2018/01/22 17:29 ashley 2017/12/01 13:33 writer 2017/12/01 13:32 writer 2017/12/01 13:32 writer 2017/11/21 22:00 writer created Next revision Both sides next revision Line 1: Line 1: - **Solar Sensor** \\ + **Sun Sensor** \\ Virtual [[power_subsys|consumption]] - 45mA Virtual [[power_subsys|consumption]] - 45mA {{ :​ru:​сд_4.png?​direct&​200| Солнечные датчики}} {{ :​ru:​сд_4.png?​direct&​200| Солнечные датчики}} - Solar sensors on satellites serve as orientation sensors, determining the satellite'​s spatial position relative to the sun. Very often they are used for the rough orientation of satellite solar panels on the sun. It should be noted that it is impossible to completely determine the orientation of the satellite only from solar sensor readings - there will always remain an uncertainty with the spacecraft rotation angle around the "​satellite-sun"​ direction. + Sun sensors on satellites serve as orientation sensors, determining the satellite'​s spatial position relative to the sun. Very often they are used for the rough orientation of satellite solar panels on the sun. It should be noted that it is impossible to completely determine the orientation of the satellite only from sun sensor readings - there will always remain an uncertainty with the spacecraft rotation angle around the "​satellite-sun"​ direction. To obtain raw measurement data, you can use the function \\ To obtain raw measurement data, you can use the function \\ Line 14: Line 14: **//​Accuracy of installation//​** \\ **//​Accuracy of installation//​** \\ - It should be noted that the accuracy of mounting the sensors inside the solar sensor bodies is not ideal - this is how it happens in real life, making each sensor unique in its own way. This is due to the inaccuracy of the manufacture of the cases relative the required size, the errors of installing electronics boards inside the cases, and the imperfection of the sensors themselves (they all differ slightly from each other). It is understood that most of such errors remain unchanged throughout the service life, although there are also errors that depend heavily on external factors (for example, temperature). In our case, we assume that the measurement errors of each sensor are constant in time and slightly dependent on temperature,​ which makes it possible to perform a one-time calibration before use. It is recommended to calibrate each of the 4 sensors in the set before use. Think for yourself about how this could be done, or contact us for advice. + It should be noted that the accuracy of mounting the sensors inside the sun sensor bodies is not ideal - this is how it happens in real life, making each sensor unique in its own way. This is due to the inaccuracy of the manufacture of the cases relative the required size, the errors of installing electronics boards inside the cases, and the imperfection of the sensors themselves (they all differ slightly from each other). It is understood that most of such errors remain unchanged throughout the service life, although there are also errors that depend heavily on external factors (for example, temperature). In our case, we assume that the measurement errors of each sensor are constant in time and slightly dependent on temperature,​ which makes it possible to perform a one-time calibration before use. It is recommended to calibrate each of the 4 sensors in the set before use. Think for yourself about how this could be done, or contact us for advice. Description of the [[old_sun_subsys|old version]] of the sensor. Description of the [[old_sun_subsys|old version]] of the sensor.