Sixteen divisional ascendants studied from a very basic standpoint. Getting to know how the ascendants work in life is important as that is the staring point of studying the sixteen D-Charts.
This is a start and details are available at the Parasara Jyotisa Course Year-2. The course website changes every year. Just make a search for the latest batch. If you are in 2020 then search “parasara jyotisa course 2020 sanjay rath”