What is "ramkali"

Ramkali is a sweet early morning raga in Hindustani classical music which belongs to Bhairav thaat. In this raga, as in Bhairav, second degree (rishabh) and sixth degree (dhaivat) are flat. The vadi-samvadi are P/S, the aroha is S r G M P, G M d N S' and the avroha is S' N d P m P, d (N)d P, G M r S. Flat nishad (seventh degree) and sharp madhyama (fourth degree) are used often.