卫星元数据
卫星元数据对于精确建模GNSS数据至关重要。这些包括唯一标识符，如SVN，COSPAR ID，卫星目录号（NORAD ID）; PRN / SVN映射;用于GLONASS的SVN /频道映射;卫星质量;质量中心;发射天线和激光后向反射器阵列偏心率;并传输功率。关于这个主题的更多细节在IGS关于卫星和操作信息的白皮书中给出（https://kb.igs.org/hc/article_attachments/115003023391/Whitepaper_SatelliteMetaData_IGS_171021.pdf），用于生成精确的GNSS轨道和时钟产品。
伽利略（https://www.gsc-europa.eu/support-to-developers/galileo-satellite-metadata）和QZSS（http://qzss.go.jp/en/technical/qzssinfo/index.html）的元数据已经由欧洲GNSS服务中心和日本政府内阁办公室（CAO）发布。 CAO还提供操作历史信息，包括轨道维护操纵和姿态开关。
为了能够以标准格式存储和交换GNSS卫星元数据，解决方案无关交换（SINEX,https://www.iers.org/SharedDocs/Publikationen/EN/IERS/Documents/ac/sinex/sinex_v202_pdf）格式的扩展。
IGS卫星元数据文件草稿（2018年3月29日）(http://mgex.igs.org/igs_metadata_1994.snx)
卫星元数据格式描述(http://mgex.igs.org/IGS_MGEX_Metadata_Format.php)
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原文链接：
http://mgex.igs.org/IGS_MGEX_Metadata.php
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