GLAS/ICESat L1A Global Laser Pointing Data (HDF5), Version 33

Level-1A global laser pointing data (GLAH04) contain two orbits of attitude data from the spacecraft star tracker, instrument star tracker, gyro, and laser reference system, and other spacecraft attitude data required to calculate precise laser pointing.一级A类全球激光指向数据（GLAH04）包含两轨来自航天器星敏感器、载荷星敏感器、陀螺仪及激光参考系统的姿态数据，以及用于计算精确激光指向所需的其他航天器姿态数据。