Absolute Gravity Measurements at Jang Bogo Station and Mario Zucchelli Station, Antarctica, in 2019

We present the results of absolute gravity measurements that were acquired at Jang Bogo Station (JBS) and Mario Zucchelli Station (MZS), Terra Nova Bay, Antarctica, during the 2019–2020 austral summer season. We employed a Micro-g LaCoste (MGL) FG5-210 absolute gravimeter for the measurements, with the MGL g9 software used for both the data acquisition and processing. The JBS measurements were acquired at an existing gravity reference point, JBSAG1, and a newly established gravity reference point, JBSAG2, with about 19,000 and 14,400 drops conducted, respectively. The MZS measurements were acquired at two existing gravity reference points, TNB AB and IAGS, where absolute gravity measurements have been repeatedly acquired, with about 12,800 and 12,300 drops conducted, respectively. The precision of the measurements is better than 0.4 μGal (1 μGal = 10−8 ms−2), yielding an estimated accuracy of better than 5 μGal at each of the occupied gravity reference points. The provided data sets consist of the binary format files from the g9 software to fully ensure the ability to reprocess these data in the future. The data are also provided in three different text formats, thereby allowing these data to be readily used for a range of potential applications. A summary of the obtained absolute gravity values is provided as an Excel file, particularly for any users that are interested in the details of the absolute gravity values.