Geodetic monitoring of isostatic rebound near the Lambert Glacier

The present-day observed change in sea level is the sum of several factors, including the continuing readjustment of the crust to the past redistribution of the surface ice-water load and any present-day melting of the Antarctic ice sheet. Constraints can be provided on both of these contributions by measuring the magnitude of the crustal rebound using the Global Positioning System. By combining the measurements with other estimates of sea-level change, it becomes possible to separate the two contributions. This will lead to both improved mass balance models for the ice-ocean system and improved understanding of present sea-level change.GPS Data:GPS data collected at sites near the Lambert Glacier. Ashtech Z-12 GPS receivers, 24 hr data files, 30 s sampling, 10 deg cutoff elevation, Ashtech cone-shaped radome used.1998----Beaver Lake (BVLK): days of year 012-083 (024 and 028 data corrupted)1999----Beaver Lake (BVLK): days of year 022-058.2000----Beaver Lake (BVLK):037-044, 308-331.Daltons Corner (DALT): 045-072.Landing Bluff (LDBF): 346-366.2001----Beaver Lake (BVLK): 008-028.Dalton Corner (DALT): 008-026.Landing Bluff (LDBF): 001-108, 114, 123, 343-365.2002----Beaver Lake (BVLK): 006-082Landing Bluff (LDBF): 001Dalton Corner (DALT): started recording day 010.BVLK: 002,006-092,103,263-264,274LDBF: 001-107, 128-130,322-365DALT: 010-030,343-365KOMS (Komsomolskiy Peak): 362-3652003----BVLK: 001-102, 358-365LDBF: 001-104, 331-343DALT: 001-105, 260-306, 353-365KOMS: 001-108, 271-3422004----BVLK: 2004 data and archive reportLDBF: 2004 data and archive reportDALT: site not visited during last field seasonKOMS: site not visited during last field season2005----BVLK: 070-241DALT: 1101-1111, 2431-3261LDBF: 0011-36512006----LDBF: 0011-36512007----DALT: 0170-1120LDBF: 0011-0991RICH (Richardson Lake, Enderby Land): 0060-1290Diagnostic Data:The diagnostic data are updated on a daily basis for those sites which have active satellite communication facilities. For other sites, the data are only retrieved on an opportunistic basis as it has to be physically downloaded from the machine. Diagnostic data are only available from 2000 onwards.Diagnostic data were collected at a test site, davi, located at Davis during 2000. The equipment was subsequently removed and redeployed in the PCMs after 2000. We did not install a GPS receiver at Davis; only diagnostic data were collected by the test installation.Further information about the Richardson Lake site is available from the provided URL.This work was completed as part of ASAC project 1112 - Crustal rebound in the Lambert Glacier area.The fields in this dataset are:YearMonthDayHourMinuteSecondBattery Voltages (bat1, bat2, bat3)Solar Panel Voltage switched across a 10 ohm resistor (pvp1, pvp2, pvp5)Fuel Cell Input Voltage (no longer used)Internal Temperature (temp1, temp2, temp3)External Temperature (temp4)Battery Status (good, low, flat, sick, dead), connected to Fuel Cell (FC) - y/nHeater Status (on - y/n - if hibernating, shows hhh) Taken from the 2008-2009 Progress Report:Public summary of the season progress:Successful automated operation of remote GPS installations in Antarctica and transmission of the data via satellite communications led to the accurate estimation of uplift rates at several sites in the Prince Charles Mountains and Enderby Land. These velocities help interpret mass balance changes as estimated from space gravity. The project was finalised and most equipment was removed. One site has not been visited since 2004 and the equipment still needs to be retrieved.

当前观测到的海平面变化是多种因素的综合结果，包括地壳对过去地表冰水载荷重新分布的持续调整，以及现今南极冰盖的融化过程。通过全球定位系统（Global Positioning System, GPS）测量地壳回弹幅度，可为这两项贡献提供约束条件。将此类测量结果与其他海平面变化估算结果相结合，即可分离出这两项贡献，这将有助于优化冰-海洋系统的质量平衡模型，并加深对当前海平面变化机制的理解。

GPS数据：在兰伯特冰川附近的站点采集的GPS观测数据。采用Ashtech Z-12型GPS接收机，采集24小时数据文件，采样间隔为30秒，截止高度角设置为10°，并使用Ashtech锥形天线罩。

1998年——比弗湖（"BVLK"）：年积日012-083（其中024、028号数据损坏）
1999年——比弗湖（"BVLK"）：年积日022-058
2000年——比弗湖（"BVLK"）：037-044、308-331；道尔顿角（"DALT"）：045-072；兰丁布拉夫（"LDBF"）：346-366
2001年——比弗湖（"BVLK"）：008-028；道尔顿角（"DALT"）：008-026；兰丁布拉夫（"LDBF"）：001-108、114、123、343-365
2002年——比弗湖（"BVLK"）：006-082；兰丁布拉夫（"LDBF"）：001；道尔顿角（"DALT"）：自年积日010起开始记录；补充："BVLK"站点数据包含002、006-092、103、263-264、274；"LDBF"站点数据包含001-107、128-130、322-365；"DALT"站点数据包含010-030、343-365；科姆斯峰（"KOMS"）：362-365
2003年——"BVLK"：001-102、358-365；"LDBF"：001-104、331-343；"DALT"：001-105、260-306、353-365；"KOMS"：001-108、271-342
2004年——"BVLK"：包含2004年数据及归档报告；"LDBF"：包含2004年数据及归档报告；"DALT"：上一野外季未到访该站点；"KOMS"：上一野外季未到访该站点
2005年——"BVLK"：070-241；"DALT"：1101-1111、2431-3261；"LDBF"：0011-3651
2006年——"LDBF"：0011-3651
2007年——"DALT"：0170-1120；"LDBF"：0011-0991；理查森湖（"RICH"，恩德比地）：0060-1290

诊断数据：对于配备有源卫星通信设施的站点，其诊断数据每日自动更新；其余站点仅可通过实地从设备中下载数据，因此仅能机会性获取。诊断数据仅可追溯至2000年。2000年，在戴维斯站的测试站点davi采集了诊断数据，该设备随后被移除，并于2000年后重新部署至极地气候监测站（PCMs）。本项目未在戴维斯站安装GPS接收机，仅通过该测试装置采集了诊断数据。关于理查森湖站点的更多详细信息可通过提供的URL获取。

本研究作为ASAC项目1112——兰伯特冰川地区地壳回弹研究的一部分完成。

本数据集包含以下字段：
年份、月份、日期、小时、分钟、秒、
电池电压（bat1、bat2、bat3）、
经10欧姆电阻转换后的太阳能板电压（pvp1、pvp2、pvp5）、
燃料电池输入电压（已不再使用）、
内部温度（temp1、temp2、temp3）、
外部温度（temp4）、
电池状态（良好、偏低、亏电、异常、失效），以及是否连接燃料电池（FC）——是/否、
加热器状态（开启-是/否-若处于休眠状态则显示hhh）

信息来源于2008-2009年项目进度报告：

本季进展公开总结：
南极洲远程GPS站点的自动化稳定运行及卫星通信数据传输取得成功，实现了对查尔斯王子山脉与恩德比地多个站点的抬升速率的精准估算。这些速率数据有助于解读由空间重力观测得到的冰-海洋系统质量平衡变化。本项目已正式收尾，大部分设备已被移除。有一个站点自2004年起未被到访，其搭载的设备仍有待回收。