SY/T 6957—2018
Replace SY/T6957—2013,SY/T 6956—2013
Technical specifications for marine gravity and magnetic data acquisitionIssue date:2018-10-29
Implementation date:2019-03-01
Contents
Foreword……………………………………………………………………………………………………… 18
1 Scope………………………………………………………………………………………………………19
2 Normative references……………………………………………………………………………………19
3 Technical design …………………………………………………………………………………………19
4Navigation and positioning ………………………………………………………………………………20
5 Marine gravity dataacquisition…………………………………………………………………………20
6 Marine magnetie data acquisition …………………………………………………………………………22
7 Anomaly accuracy calculation and leveling………………………………………………………………23
8 Delivenables ……………………………………………………………………………………………24
Annex A(Informative)The template of marine gravity daily log ………………………………………26
Annex B(Informative)The template of marine magnetic daily log……………………………………27
Annex C(Informative)The template of marine gravity sill reading……………………………………28
Annex D(Normative)Gravity anomaly calculation………………………………………………………29
Annex E(Normative)Magnetic anomaly calculation ……………………………………………………32