Devata: Cosmic measurer/light (often interpreted within Savitṛ/Āditya sphere).
Chandas: Undetermined from excerpt alone.
Samhita Patha (Devanagari)
वि॒मान॑ ए॒ष दि॒वो मध्य॑ आस्त आपप्रि॒वान् रोद॑सी अ॒न्तरि॑क्षम् । स वि॒श्वाची॑र॒भि च॑ष्टे घृ॒ताची॑रन्त॒रा पूर्व॒मप॑रं च के॒तुम्
Transliteration
vimā́na eṣá divó mádhya āsta āpaprivā́n ródasī antárikṣam | sá viśvā́cīr abhí caṣṭe ghṛtā́cīr antárā pū́rvam áparaṃ ca ketúm
Translation
This measurer hath stood in mid-heaven, filling the two worlds and the air. He looketh forth on all-directed, ghee-bright (rays), between the former and the latter token of light.