衛星アルティメトリィと衛星重力ミッション Satellite Altimetry and Satellite Gravity Missions

この論文にアクセスする

この論文をさがす

著者

抄録

This paper reviews satellite altimetry mainly from a geodetic and oceanographic point of view; discusses the relationship between satellite altimetry and gravity missions; besides it gives a preview of the gravity missions and their meaning in the study of the Earth's sciences. Satellite altimetry is a technique for measuring sea surface heights from a satellite orbit using a microwave radar altimeter. This technique has brought about a revolution in the study of marine gravity fields, and then in the oceanographic studies. With the sea surface being a good approximation of the geoid, sea surface heights measured by satellite altimeter are con sidered to be approximate geoid heights. On the other hand, there exist small differences between sea surface and geoid heights. The differences are referred to as sea surface dynamic heights which are caused by the ocean currents. Therefore absolute current flux could be de tected by satellite altimetry, if precise geoid is determined independently from satellite altimeter data, This is the main reason why a precise oceanic geoid has been desired for a longperiod of time by oceanographers. All the satellite gravity missions which were planed late 1980's and early 1990's aimed at the improvement of the accuracy of static gravity fields. Compared with these missions, GRACE has a rather different concept. Very accurate measurements by GRACE will be expected to reveal not only precise static gravity fields, but also the temporal variations of the gravity fields. GRACE aims, for the first time in history, to ob serve various mass movements which occur in, on and above the Earth's surface as gravity changes. There is no doubt coming satellite gravity missions will bring about revolution in the studies of the Earth's sciences.

収録刊行物

  • 測地学会誌  

    測地学会誌 46(1), 53-67, 2000-03-25 

    The Geodetic Society of Japan

参考文献:  35件

参考文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

被引用文献:  5件

被引用文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

各種コード

  • NII論文ID(NAID)
    10004563621
  • NII書誌ID(NCID)
    AN00134900
  • 本文言語コード
    JPN
  • 資料種別
    OTR
  • ISSN
    00380830
  • NDL 記事登録ID
    5359275
  • NDL 雑誌分類
    ZM41(科学技術--地球科学)
  • NDL 請求記号
    Z15-161
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
ページトップへ