Jaimini astrology defines the Chara Karakas. These Karakas depend on the planetary positions in the horoscope. Most important is Atma Karaka (Karaka of self), see Parasara Hora Shastra
Out of these Karakas, Atma Karaka is the most important and has a prime say on the native, just as the king is the most famous among the men of his country and is the head of all affairs and is entitled to arrest and release men. (BPHS 32.8)
Eight Karakas are defined
|2||Amatya Karaka||2nd Karaka for self|
|8||Stree or Dara Karaka||Spouse and husband|
In Chara Karaka calculation only the traversed longitude of the planets in their specific sign is considered. So the planet with the highest longitude in his sign is Atma Karaka, the second Amatya Karaka etc.
Rahu is always considered in reverse manner: the order of Rahu depends upon the distance from the end of his sign because Rahu is a regrograde planet.
Raman and Shastri use only the seven planets for Chara Karaka calculation. Dara Karaka is missing in this system.
Arudha Padas are one of the most important features in Jaimini astrology. Each house of a chart has its Arudha Pada as a second point of influence.
Special Arudhas are
Remark: Arudha Padas are defined for all Vargas.
The rule for Arudha calculation: count so many signs from the lord of a sign as the lord is away from the basic sign.
Example: Second house is Capricorn, Saturn is in Pisces. So the distance from the underlying house (Cp) to Saturn is 3 signs. Count 3 signs from Pisces, so Taurus will be the Arudha of the second house.
Rahu and Ketu play a special role in Jaimini astrology: they are co-lords of Aquarius (Rahu) and Scorpio (Ketu).
So Rahu must be taken as lord of Aquarius if Rahu is stronger than Saturn. Same for Ketu: Ketu is the lord of Scorpio if Ketu is stronger than Mars.
Parasara establishes that there are some exceptions from the above rule (fourth house rule).
Rule: if the lord of the house is in the 1st, 4th, 7th or 10th house, 4 houses must be deducted from the result.
Raman and Shastri do not apply the fourth house rule for Arudha calculation.
This rule can be configured in the configuration dialog (vedic calculation tab) of Maitreya.
Most Jaimini astrologers do not follow this rule.