Table 3: Names, latitudes, longitudes of measurement stations, and period of data. Also shown in this table are the values of root mean square different (RMSD) and mean bias difference (MBD) obtained from the comparison between the model and measured long-term monthly average daily radiations.

No.StationsLatitude
(Degree)
Longitude
(Degree)
Altitude
(m)
Period of dataRMSD (%)MBD (%)

1Chiang Rai20.0899.88495Jan, 2002–Dec, 20097.13.7
2Mae Hong Son19.4397.96730Jan, 2002–Dec, 200911.66.5
3Doi Intanon (Mae Klang)18.4098.67564Mar, 2005–Dec, 200910.33.1
4Nan18.72100.75459Jan, 2002–Dec, 20095.6−1.2
5Chiang Mai (Sansai)18.8398.88565Jan, 2002–Dec, 20095.1−2.3
6Mae Sa Riang18.1797.93698Jan, 2005–Dec, 20094.4−0.9
7Phrae18.06100.06390Jan, 2005–Dec, 20094.6−1.9
8Tak16.8098.90562Jan, 2002–Dec, 20097.9−1.8
9Loei17.40101.00492Apr, 2005–Dec, 20094.0−0.5
10Nong Khai17.87102.72177Jan, 2002–Dec, 20093.7−0.8
11Khon Kaen16.45102.78179Feb, 2002–Dec, 20094.1−0.4
12Nakhon Panom16.97104.73184Jan, 2002–Dec, 20095.1 1.7
13Surin14.88103.50162Jan, 2002–Dec, 20092.7 0.1
14Ubon Ratchathani (Agr. Met)15.28105.14160Jan, 2002–Dec, 20093.7 1.5
15Nakhon Ratchasima14.97102.08218Jan, 2002–Dec, 20092.6 0.6
16Roi Et16.07103.00153Mar, 2006–Dec, 20095.8−5.0
17Phitsanulok16.78100.27137Jan, 2002–Dec, 20093.6−1.3
18Phetchabun16.43101.15250Jan, 2002–Dec, 20093.3−0.6
19Nakhon Sawan15.67100.1250Jan, 2002–Dec, 20093.1 0.6
20Lop Buri14.83100.6254Jan, 2002–Dec, 20093.6 0.4
21Bangkok13.75100.522Apr, 2002–Dec, 20097.4 6.6
22Kanchanaburi (Muang)14.0299.53159Jan, 2005–Dec, 20093.8−0.7
23Kanchanaburi
(Thong Pha Phum)
14.7398.63345Jan, 2002–Dec, 20092.9−0.2
24Sa Kaeo (Aranyaprathet)13.70102.0062Jan, 2007–Dec, 20094.7 2.6
25Trat11.77102.8868Mar, 2006–Dec, 20095.1−0.7
26Prachin Buri13.97101.7046Jan, 2002–Dec, 20092.8−1.3
27Chon Buri13.37100.975Mar, 2005–Dec, 20094.4−0.5
28Prachuap Khiri Khan11.8399.831Feb, 2002–Dec, 20095.3 2.6
29Chumphon10.4099.188Mar, 2005–Dec, 20099.8 7.6
30Ranong9.9898.6234Jan, 2002–Dec, 20092.4 1.7
31Surat Thani (Samui)9.47100.051Jan, 2002–Dec, 20093.6 1.1
32Surat Thani (Punpin)9.1399.1510Apr, 2005–Dec, 20095.3 0.7
33Phuket8.1398.3026Jan, 2002–Dec, 20096.4−5.0
34Trang7.5299.6255Mar, 2005–Dec, 20095.0−0.2
35Songkhla (Hadyai)6.92100.4353Jan, 2002–Dec, 20094.3 0.3
36Narathiwat6.40101.828Feb, 2002–Dec, 20094.4−1.6
Combined data5.3 0.3

 *As the comparison is based on the long-term monthly average values, the total number of data used to calculate RMSD and MBD are equal to 12.