User:Bluedecklibrary/天格计划
{{notability|time=2019-01-27T05:57:03+00:00}}
{{unreferenced|time=2019-01-27T05:57:03+00:00}} {{noteTA |G1=Astronomy }}
{{Infobox spacecraft | Name = 天格计划首颗实验卫星 | Image = | Caption =
| Organisation = 清华大学
天仪研究院
| Major_Contractors = 清华大学
天仪研究院
| Bus =
| Mission_Type = 天体物理学
| Flyby_Of =
| Flyby_Date =
| Current_Destination =
| Satellite_Of = 地球
| Orbital_Insertion_Date =
| Orbits = 近地軌道
| Launch Date = 2018年10月29日 00:43 UTC
| Carrier_Rocket = 长征二号丙运载火箭
| Flight Number =
| Launch_Site = {{CHN}}中国酒泉卫星发射中心
| Mission_Duration =
| MissionHighlight = | Decay =
| COSPAR_ID = 2018-083B | nolink = | Webpage = | Mass = | Dimensions = | Power = | Batteries =
| orbit_reference = | Orbit_regime = | Semimajor_Axis = | Eccentricity = | Inclination = 97.5° | orbit_altitude = | Apoapsis = 530.9 km | Periapsis = 516.1 km | Orbital_Period = 95.0 min | Longitude = | Repeat_Interval = | Orbits Daily = | Repetitivity = | orbit_swath = | orbit_crossing =
| Planet = | Planet_Landing = | Planet_Coords = | Planet_Depart =
| Instruments = | Main_Instruments = | Resolution = | Spectral_Band = | Data_Rate = | SSR = | IMG_Resolution =
| Transponders = | Transponder Capacity = | Coverage = | Twta output power = | Bandwidth = | EIRP =
| Refs = | Below = }}
天格计划({{lang-en|Gamma Ray Integrated Detectors}}，或GRID)，即空间分布式引力波暴电磁对应体探测网，是利用{{le|立方星|CubeSat}}搭载的、覆盖全天的伽马射线暴探测网络，可与地面引力波探测器{{le|LIGO|LIGO}}、{{le|Virgo|Virgo interferometer}}等协同工作，实现对中子星并合引起的引力波暴电磁对应体的全天监测和高精度定位。
本项目的主要科学目标是寻找中子星并合导致的引力波暴在高能电磁波段（伽马射线波段）的对应体。由于地面引力波探测器灵敏度的局限性，只能探测到约200Mpc以内的中子星并合事件。这个距离内的伽马暴短暴发生率可能极低，但一旦喷流对准地球，暴发流强将极大。因此，这是一个针对明亮稀有事例的探测。受地球遮挡，低轨卫星只能覆盖约60%的天区。天格计划利用多颗立方星在约500-600公里的低地球轨道组成伽马射线暴探测网，建成全天4π立体角灵敏的探测网络，并利用不同探测器之间伽马暴信号的时间延迟和流强差异，对暴源方向进行精度小于10°的定位。