Airborne absolute gravimetry with a Quantum sensor

• Main Authors: Jensen, T., Bidel, Y., Zahzam, N., Bresson, A., Blanchard, C., Bonnin, A., Cadoret, M., Bernard, J., Forsberg, R., Salaün, C., Lucas, S., Lequentrec-Lalancette, M., Rouxel, D., Gabalda, G., Seoanne, L.
• Format: Conference Object
• Language: English
• Published: 2023
• Subjects: Blanchard; Malo; Iceland
• Online Access: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017942

In 2019 the French Aerospace Lab (ONERA) carried out an airborne gravity survey to test their quantum absolute gravimeter, GIRAFE, targeting three different locations in France. This was done with the support of the French Laboratory of National Meteorology (LCM-CNAM), the French Hydrographic and Oceanographic Office (SHOM), the French Laboratory of Geoscience Environment (GET) and the National Space Institute at the Technical University of Denmark (DTU Space). On board the aircraft was also a classical strapdown gravimeter provided by DTU Space, to be used as a reference for the GIRAFE observations. Here we will present the results of the survey along with a comparison with both the classical sensor, marine observations and altimetry derived gravity data. The results show that the GIRAFE estimates have improved dramatically since the first airborne test carried out in Iceland 2017, reaching an accuracy of 0.6 to 1.3 mGal. It is also evident that the long-term stability of the GIRAFE instrument is significantly better than the classical strapdown system. P.S. the actual actract had more than 15 authors: Yannick Bidel, Nassim Zahzam, Alexandre Bresson, Cédric Blanchard, Alexis Bonnin, DPHY-ONERA Malo Cadoret, Jeanne Bernard, LCM-CNAM Tim E. Jensen (presenter), René Forsberg, DTU Space Corinne Salaün, Sylvain Lucas, Marie-Francoise Lequentrec-Lalancette, Didier Rouxel, SHOM Germinal Gabalda, Lucia Seoanne, Dinh Toan Vu, Sylvain Bonvalot, GET (CNRS, IRD, UPS, CNES)