THE FIRST EXPERIENCE OF THE GABL-PM ABSOLUTE LASER BALLISTIC GRAVIMETER INSTALLED ON BOARD AN ICE-RESISTANT PLATFORM WITHOUT GYROSTABILIZATION.
D.A. Nosov1, D.K. Dronov2, Y.G. Turbin2, I.S. Sizikov1.
1Institute of Automation and Electrometry of the Siberian Branch of the Russian Academy of Sciences, postal Novosibirsk, Russia
2Arctic and Antarctic Research Institute, St:Petersburg, Russia
Abstract
The article presents the first experimental work with the GABL-PM absolute ballistic laser gravimeter on the pier, in ports and on board the ice-resistant platform (LSP) in the expedition "North Pole-42" (SP-42). During the tests, the parametric adjustment of the gravimeter was carried out in order to adapt the device for its operation on the LSP without using a gyrostabilized platform. The results of the GABL-PM measurements at the berth in St. Petersburg are shown, which are required as a reference for testing the gravimeter on the ship, as well as for linking variations in gravity acceleration measured on board the LSP with the Chekan-AM relative gravimeter to absolute values. The estimation of the RMS error of the GAB-PM measurement on board the LSP at various pitching parameters in the ports of St. Petersburg and Murmansk, as well as in the early days of the start of the drift of the North Pole-42 expedition, is given. Based on the measurement results, it was concluded that a gravimeter without a gyrostabilized platform with reduced accuracy values, on average up to 0.60 mGal, can be used to carry out measurements after freezing the vessel and when following all the points of a specially developed instruction.
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