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

格陵兰冰盖对海平面上升的持续贡献一直是科学界、政策制定者和广大民众感兴趣的问题。冰盖质量损失的大地测量是地理信息系统对海平面上升贡献研究的核心。确定质量损失的方法有很多，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)。讲习班的目标是：1)确定格陵兰目前的全球导航卫星系统观测网络的社区需求；2)概述网络设计的科学要求；3)确定现有全球导航卫星系统网络的前进道路；4)确定对现有网络的改进，使更广泛的科学界受益。根据更广泛的影响，讲习班将把使用当前网络产生的数据的调查员以及可能利用全球导航卫星系统网络数据的新调查员聚集在一起。讲习班召集人计划招募从初级到高级科学家的参与者，并尽可能增加讲习班参与者的多样性，包括提供资金的邀请。这次讲习班的目标是于2017年1月在美国宇航局戈达德太空飞行中心举行为期1.5天的讲习班，目的是为格陵兰岛的全球导航卫星系统(GNSS)观测网确定前进道路。研讨会将与2017年美国国家航空航天局北极区域气候评估计划(PARCA)会议同时举行。讲习班的目标是阐明全球导航卫星系统网络的现状，说明网络数据的当前用途(例如大地测量、地壳形变、大气建模、空间天气)，确定数据的潜在新用途，并确定未来网络的最佳配置(例如，理想的站点数量、站点的布置、站点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).