Add SRRA stations India

[IoannisSifnaios]

A typical SRRA station consists of two towers of 1.5 m and 6 m tall. The 1.5 m tall tower is equipped with a solar tracker, one Pyrheliometer and two pyranometers (one with shading disc) to measure direct, global and diffuses irradiance respectively. The 6 m tall tower houses meteorological sensors for measuring ambient temperature, relative humidity, atmospheric pressure, wind speed & direction, rain fall and a state of-the-art data acquisition system. The solar sensors are traceable to World Radiation Centre/World Radiometric Reference (WRC/WRR) and the meteorological sensors are traceable to the World Meteorological Organization (WMO) respectively. The SRRA station is powered by solar energy for independent operation and has power autonomy for a week. A trigger switch is also part of the SRRA station to track the cleaning status of the station on a daily basis.

One hundred and eleven (111) SRRA stations have been commissioned in the country in 29 States and 3 Union Territories (UT) during the period May 2011 to June 2014. The specifications of the sensors / instruments used in both the phases are identical, except for the inclusion of lightning arrestor and energy meter in the second phase of SRRA stations. Data collection sampling is 1 sec and basic data average is 1 minute.

Information on the stations can be found here.

[IoannisSifnaios]

Expands on #139

[IoannisSifnaios]

Added Phase 1 stations. The AMS stations are the BSRN stations that already exist in the station list.