LGO Antenna Phase Centre Values (PCV) for Viva antennas (LGO v7) When you hire instruments from us, you will receive a fully licensed version of Leica Geo Office (v7). If you are hiring Viva GNSS, such as GS08, GS12, GS10 or GS15, and you wish to view/process your observations in LGO, you will need to install this patch. It contains all the necessary PCV’s for Viva antennas, which are not included in the standard list (LGO_Ant_Info_en.009). Click the link to download - Viva into LGO