Halley_6a 18Z msl_pressure
2018   986.5   982.1   986.3   992.0   986.7   992.8   983.8   987.1   981.6   986.3   981.3   984.7
2019   985.4   989.5   987.7   987.8   986.8   984.2   995.4   990.5   982.5   986.9   991.8   996.5
2020   991.3   987.5   982.4   984.9   986.0   988.4   989.9   997.3   986.1   982.9   977.8   982.2
2021   985.8   982.4   984.7   978.4   986.3   990.6   993.3   985.7   979.4   985.7   981.2   976.7
2022   988.3   986.0   987.8   984.9   989.0   996.2   985.8   991.6   984.9   981.1   976.1   980.7
2023   982.3   989.6   985.7   992.2   987.4   995.4   987.9   990.8   989.9   979.5   988.1   982.2
2024   988.0   981.2   985.4       -       -       -       -       -       -       -       -       -