Glacier stake locations, McMurdo Dry Valleys, Antarctica (1993-2020, ongoing)

As part of the Long Term Ecological Research (LTER) project in the McMurdo Dry Valleys of Antarctica, a systematic sampling program has been undertaken to monitor mass balance and meltwater flow from the Taylor Valley glaciers. This data set contains global positioning system (GPS) measurements of stakes on glaciers. The measurements include both low-quality estimates (+/- 100m) from hand-held GPS units and high precision measurements (+/- 2 cm) using Trimble (4000 SSE) geodetic receivers. The purpose of these measurements was to obtain rough stake locations for use in relocating stakes in the future and precise stake locations for use in calculating stake displacement. The measurements are made relative to the WGS84 ellipsoid.

作为南极洲麦克默多干谷长期生态研究（Long Term Ecological Research, LTER）项目的一部分，本研究已实施系统性采样计划，用于监测泰勒谷冰川的物质平衡与融水径流。本数据集包含冰川桩的全球定位系统（Global Positioning System, GPS）观测数据，涵盖两类观测结果：一类为手持GPS设备获取的低精度估算值（误差范围±100米），另一类为使用天宝（Trimble）4000 SSE大地测量接收机获得的高精度观测值（误差范围±2厘米）。本次观测的核心目的为获取冰川桩的粗略位置，用于后续的桩位复测，并获取精确桩位以计算冰川桩的位移量。所有观测均以WGS84椭球面为基准参考系。