The highest type of Ātāpanā (exposure of naked body to sun-rays by sitting on the sun-baked ground);
the Ātāpanā undertaken in the lying down postures of a person who is adhorukaśāyī, pārśvaśāyī and uttānaśāyī (lying down on back, sides and stretching the legs, respectively).
nippannasyotkṛṣṭah......nippannātāpanā'pi tridhā- adhortikaśāyitā pārśvaśāyitā uttānaśāyitāceti.
(AupaVṛ Pa 75)