Often either STK (expensive, but there is a free version) or CNES VTS (free) Source: I use them both at work. Links: https://www.agi.com/products/engineering-tools https://logiciels.cnes.fr/content/vts
Often either STK (expensive, but there is a free version) or CNES VTS (free) Source: I use them both at work. Links: https://www.agi.com/products/engineering-tools https://logiciels.cnes.fr/content/vts