Position measurements at GNSS station SMR5 in 2023 with links to RINEX data files

SMR5 GNSS long-term raw-data series is aimed at contributing to the scientific research of Earth-System-involved global- as well as Antarctic-regional processes, improving International Terrestrial Reference Frame (ITRF) redefinitions, and benefiting society through enhanced GNSS-derived applications and services. The dataset was gathered at the Argentinean (Antarctic) research station San Martín in the year 2023. Approximate position in ITRF2014 frame at epoch 2023.5: X=927077.25m, Y=-2195043.59m, Z=-5896521.09m or in (GRS80) ellipsoidal coordinates: lat=68°07'46.850S, lon=067°06'11.599W, h=26.8m, orthometric height above EGM2008 geoid amounts 17.3m. GNSS receiver: TRIMBLE NetR9 (SN: 5226K50357), GNSS antenna: Zephyr Geodetic 2 w/Dome, PN: 57971-00 (SN: 30976593), Sampling interval: Originally 1 second, downsampled in postprocessing to 15 seconds. Each file covers a time period of one day. RINEX files have been converted from original TRIMBLE proprietary T02 files, applying software tools runpkr00 and teqc. RINEX format version is 2.11. Finally the data have been compressed applying Hatanaka tool (Hatanaka, Y. (2008), A Compression Format and Tools for GNSS Observation Data, Bulletin of the Geospatial Information Authority of Japan, 55, 21-30, available at https://www.gsi.go.jp/ENGLISH/Bulletin55.html) and gzip.

SMR5 GNSS长期原始数据序列旨在助力涉及地球系统的全球及南极区域过程的科学研究，推动国际地球参考框架（International Terrestrial Reference Frame, ITRF）的重新定义，并通过优化GNSS衍生的应用与服务造福社会。本数据集采集于2023年的阿根廷（南极）圣马丁研究站。其在ITRF2014框架下2023.5历元的近似位置为：X=927077.25m，Y=-2195043.59m，Z=-5896521.09m；或采用（GRS80）椭球坐标表示：纬度68°07'46.850''S，经度067°06'11.599''W，大地高26.8m，基于EGM2008大地水准面的正高为17.3m。所用GNSS接收机为TRIMBLE NetR9（序列号：5226K50357），GNSS天线为带Dome罩的Zephyr Geodetic 2，部件号：57971-00（序列号：30976593）。初始采样间隔为1秒，经后处理下采样至15秒。每个数据文件涵盖1天的观测时长。RINEX文件由原始TRIMBLE专有T02文件转换得到，转换过程使用了runpkr00与teqc软件工具。RINEX格式版本为2.11。最终数据通过Hatanaka压缩工具（Hatanaka, Y. (2008), A Compression Format and Tools for GNSS Observation Data, Bulletin of the Geospatial Information Authority of Japan, 55, 21-30，可通过https://www.gsi.go.jp/ENGLISH/Bulletin55.html获取）及gzip进行压缩。