Shankarabharanam is a 29 dhira Shankarabharanam Melakarta Ragam with the same name in Dikshitar's asampoorna melakarta system. Its a sampoorna ragam with panchama chakram and Madhyama Bhana (see niraval for the meaning). In Hindustani music, its called the 'Bilaval thaat', one of the major building blocks of Hindustani musical system. Apparently its Western classical equivalent is C Major with the notes Doh, Re, Mi, Fah, So, La, Ti set to this raga. Interesting !!
Considering the Arohanam and avarohanam ...
Aa: S R2 G3 M1 P D2 N3 S
Av: S N3 D2 P M1 G3 R2 S
By definition, the Melakarta Ragams are symmetric with respect to going up in octave or down and technically speaking the Arohanam and the Avarohanam are simply reversed in Melakarta Ragams, hence called "Sampoorna (complete)" ragam. This raga has tremendous scope for elaboration and is very popular and a particular favorite of all singers in the Ragam-Tanam-Pallavi segment of a concert and is suitable for singing in the evening... yeah, karnatic music has time-based ragas too
Shankar+abharanam=Shankarabharanam, meaning the ornaments of Lord Shiva, symbolically associating swaras as the seven ornaments.
Shankarabharanam has the largest number of Janya ragams (the janya entry is still under construction) viz. :: Arabhi, Athana, Bangala, Begada, Behag, Bilahari, Durbar, Durvanki, Devagandhari, Garudadhwani, Gaudamalhar, Hamsadhwani, Hamsavinodhini, Janaranjani, Kadanakuthoohalam, Kanada, Kannada, Kedaram, Kuranji, Maahuri, Navaroj, Nagadhwani, Narayani, Narayanadesakshi, Nilambari, Phalamanjari, Purnachandrika, Purvagowla, Sahana, Sama, Saraswatimanohari, Sindumandari, Suddha Vasantham, Suddha Saveri, Vasantha.
Hmm... there is so much more but the entry is long as is so let me stop the technical details for now or i shall never finish. I did want to mention that it is possible to compose sahityam in different talams and Muthuswami Diskhitar has composed around 40 songs in Sankarabharanam known as Nottu Swara sahityam. I have been learning ShyamaShastri's "sarojadaLa nEtri himagiri putri" set to Adi tala and the niraval explanation will be specific to this song.
For more musical entries, read http://svaksha.com/category/ART/Music