南极长城站2002年SCAR GPS国际联测数据

南极板块运动监测等地球动力学问题的研究是国际南极地学界多年来关注的大尺度、长周期研究计划，属于南极环境长期变化的研究范畴。我国从“八五”开始这一领域的研究。从92年开始，SCAR组织协调十几个国家30多个南极站参加每年一度的连续22天的南极GPS会战联测。我国从94年参加该国际合作研究。 GPS国际联测是由SCAR－WGGGI组织实施的一项国际大型合作科研项目。其目的在于： （1）测量南极板块与各相邻板块以及微板块之间的相对运动速率和其运动方向； （2）确定南极板块内部的各个地壳块体之间的相对运动； （3）统一南极的垂直系统的基准，确定各南极皴法站海拔高程； （4）进行由于冰盖融化和海洋负荷变化引起的南极岩石圈的垂直运动等“全球与南极的相互作用”方面的科学研究。 本次GPS国际联测时间为2002年1月20日00：00(UTC)-2002年2月10日24：00（UTC）,累计时间为22天，要求每日连续24小时观测。实际观测时间为2002年1月10日到2002年2月28日。 本次联测采用的Trimble 4000ssi 是由武汉大学测绘学院提供，其具有L1，L2双频相位输出，且能接受GPS卫星元P1,P2和P码，为国际先进、高精度、国际联测和全球许多IGS站点普遍采用。Research on geodynamic issues such as Antarctic plate motion monitoring is a large-scale, long-term research plan that has long been a focus of the international Antarctic geoscience community, falling within the scope of long-term changes in the Antarctic environment. China has conducted research in this field since the Eighth Five-Year Plan period. Since 1992, the Scientific Committee on Antarctic Research (SCAR) has coordinated over a dozen countries and more than 30 Antarctic stations to participate in the annual 22-day continuous Antarctic GPS campaign joint survey, and China joined this international cooperative research program in 1994. The GPS international joint survey is a large-scale international cooperative scientific research project implemented by SCAR-WGGGI. Its objectives are as follows: (1) Measure the relative motion velocities and directions between the Antarctic Plate and its adjacent plates as well as microplates; (2) Determine the relative motions between individual crustal blocks within the Antarctic Plate; (3) Unify the vertical datum system of Antarctica and determine the elevation of each Antarctic research station; (4) Conduct scientific research on 'global-Antarctica interactions' such as the vertical motion of the Antarctic lithosphere caused by ice sheet melting and ocean load changes. The scheduled time for this 2002 GPS international joint survey was from 00:00 UTC on January 20, 2002 to 24:00 UTC on February 10, 2002, totaling 22 days, with a requirement for 24-hour continuous daily observations. The actual observation period was from January 10 to February 28, 2002. The Trimble 4000ssi equipment used in this joint survey was provided by the School of Geodesy and Geomatics, Wuhan University. It features dual-frequency L1 and L2 phase output and is capable of receiving GPS satellite signals on P1, P2, and P codes. As an internationally advanced, high-precision instrument, it is widely adopted in international joint surveys and by numerous IGS (International GNSS Service) stations worldwide.