@article{fdi:010080901,
  title = {{S}tatus of the international gravity reference system and frame},
  author = {{W}ziontek, {H}. and {B}onvalot, {S}ylvain and {F}alk, {R}. and {G}abalda, {G}erminal and {M}akinen, {J}. and {P}alinkas, {V}. and {R}ulke, {A}. and {V}itushkin, {L}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he increasing importance of terrestrial gravimetry in monitoring global change processes, in providing a reference for satellite measurements and in applications in metrology necessitates a stable reference system reflecting the measurement accuracy achievable by modern gravimeters. {T}herefore, over the last decade, the {I}nternational {A}ssociation of {G}eodesy ({IAG}) has developed a system to achieve accurate, homogeneous, long-term global recording of {E}arth's gravity, while taking advantage of the potential of today's absolute gravity measurements. {T}he current status of the {I}nternational {G}ravity {R}eference {S}ystem and {F}rame is presented as worked out by the {IAG} {J}oint {W}orking {G}roup 2.1.1 "{E}stablishment of a global absolute gravity reference system" during the period 2015-2019. {H}ere, the system is defined by the instantaneous acceleration of free-fall, expressed in the {I}nternational {S}ystem of {U}nits ({SI}) and a set of conventional corrections for the time-independent components of gravity effects. {T}he frame as the systems realization includes a set of conventional temporal gravity corrections which represent a uniform set of minimum requirements. {M}easurements with absolute gravimeters, the traceability of which is ensured by comparisons and monitoring at reference stations, provide the basis of the frame. {A} global set of such stations providing absolute gravity values at the microgal level is the backbone of the frame. {C}ore stations with at least one available space geodetic technique will provide a link to the terrestrial reference frame. {E}xpanded facilities enabling instrumental verification as well as repeated regional and additional comparisons will complement key comparisons at the level of the {I}nternational {C}ommittee for {W}eights and {M}easures ({CIPM}) and ensure a common reference and the traceability to the {SI}. {T}o make the gravity reference system accessible to any user and to replace the previous {IGSN}71 network, an infrastructure based on absolute gravity observations needs to be built up. {T}his requires the support of national agencies, which are encouraged to establish compatible first order gravity networks and to provide information about existing absolute gravity observations.},
  keywords = {{G}ravity reference system and frame ; {A}bsolute gravimeter},
  booktitle = {},
  journal = {{J}ournal of {G}eodesy},
  volume = {95},
  numero = {1},
  pages = {7 [9 p.]},
  ISSN = {0949-7714},
  year = {2021},
  DOI = {10.1007/s00190-020-01438-9},
  URL = {https://www.documentation.ird.fr/hor/fdi:010080901},
}