Workshop proposal: The future shape of a Greenland GNSS Observation Network

格陵兰冰盖（GIS）对海平面上升的持续贡献是科学界、决策者和广大民众持续关注的问题。用大地测量法测定冰盖质量损失是研究地理信息系统对海平面上升贡献的核心。有许多方法可以确定质量损失，但几乎所有方法都依赖于某种形式的卫星定位，通常使用全球导航卫星系统（GNSS）或其子集全球定位系统（GPS）。研讨会的目标是：1)确定当前格陵兰岛GNSS观测网络的社区需求，2)概述网络设计的科学要求，3)确定现有GNSS网络的前进道路，以及4)确定现有网络的改进，这将使更广泛的科学界受益。根据更广泛的影响，研讨会将汇集使用当前网络产生的数据的调查人员以及可以利用全球导航卫星系统网络数据的潜在新调查人员。研讨会召集人计划从从初级科学家到高级科学家的范围中招募参与者，并通过包括资助邀请，尽可能增加研讨会参与者的多样性。本次研讨会的目标是于2017年1月在美国宇航局戈达德太空飞行中心召开为期1.5天的研讨会，目的是为格陵兰岛的全球导航卫星系统（GNSS）观测网络确定前进道路。该研讨会将与2017年美国宇航局北极区域气候评估计划（PARCA）会议同时举行。研讨会的目标是阐明GNSS网络的现状，说明网络数据的当前用途（例如，大地测量学、地壳变形、大气建模、空间天气），确定数据的潜在新用途，并确定网络向前发展的最佳配置（例如，理想的台站数量、台站的位置、台站的替换和升级以及数据管理）。

The ongoing contribution of the Greenland Ice Sheet (GIS) to sea level rise is of continuing interest to the scientific community, policymakers, and the population at large. Geodetic determination of ice sheet mass loss is at the center of research on GIS contributions to sea level rise. There are many means for determining mass loss, but almost all rely on some form of satellite positioning, generally using the Global Navigation Satellite System (GNSS) or its subset Global Positioning System (GPS). The goals of the workshop are to 1) determine the community need for the current GNSS observation network in Greenland, 2) outline the science requirements for the network design, 3) define the path forward for the existing GNSS network, and 4) identify improvements to the existing network that will benefit the broader science community. Per broader impacts, the workshop will bring together investigators using data produced by the current network along with potential new investigators who can make use of GNSS network data. The workshop conveners plan to recruit participants from a spectrum from junior to senior scientists, and increase the diversity of the workshop participants wherever possible, by including funded invitations.The objective of this workshop is to convene a 1.5 day workshop at NASA Goddard Space Flight Center in January 2017, with the purpose of defining a path forward for a Global Navigation Satellite System (GNSS) observation network in Greenland. The workshop will be held in conjunction with the 2017 NASA PARCA (Program for Arctic Regional Climate Assessment) Meeting. The goals of the workshop are to elucidate the current state of the GNSS network, illustrate the current uses of the network data (e.g., geodesy, crustal deformation, atmospheric modeling, space weather) and identify potentially new uses of the data, and determine the optimal configuration of the network moving forward (e.g., the ideal number of stations, the placement of stations, the replacement and upgrade of stations, and data management).