Akpootu, D. O.; Agidi, O. E.; Momoh, M.; Garba, I. I. A Comparative Study for the Estimation of Downward Longwave Radiation under Clear Sky Condition across the Midland Climatic Zone of Nigeria. NJP 2026, 35 (3), 291-306. https://doi.org/10.62292/njp.v35i3.2026.603.