A Review of Solar Radiation Models—Part I

Table 1

Regression coefficients of sixth order polynomial (57) for different cities of India.

City	𝑎6	𝑏6	𝑐6	𝑑6	𝑒6	𝑓6	𝑔6
Trivandrum	−14.2	202.1	−1103.2	3075.6	−4645.1	3626	−1148.8
Kodaikanal	3.3	−54.9	391.6	−1379.2	2579.4	−2439.1	914.9
Madras	−57.9	607.9	−2594.1	5803.9	−7179.9	4659.6	−1240.3
Goa/Panji	−5.9	99.6	−591.9	1725.5	−2637.4	2031	−621.6
Vishakhapatnam	3.2	−31.6	132.4	−260.3	258.1	−121.6	20.6
Pune	7.5	−126.5	830.6	−2587.1	4131.4	−3270.5	1017.9
Mumbai	−0.6	17.1	−107.6	336	−543.7	437.4	−138.3
Nagpur	8.7	−126.8	744.1	−2175.1	3376.3	−2660.9	838.3
Bhaunagar	4.5	−72.3	460.6	−1403.9	2217.9	−1748.3	542.9
Ahmedabad	−40.7	557	−2913.5	7548.4	−10314.9	7127	−1963.6
Kolkata	120.2	−1615.5	8855.7	−25284.5	39698.8	−32525	10871.3
Shilong	4.41	−93.3	786.7	−3160.2	6534.3	−6692.6	2685.3
Jodhpur	−9548.5	83762.7	−304722	588492.5	−636355	36533.9	−86994.9
Kanpur	−4403.9	45088.2	−188221.5	411457.7	−497959	316921.4	−82990.2
Lucknow	−788	6597.75	−22837.6	41857.6	−42847.4	23230.5	−5212.8
New Delhi	−6326.6	66694.4	−290381.6	668728.9	−859459.2	584685.8	−164539.1