Solar Data Sharing and Accessibility Policy (SDSAP-2016)

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Jawaharlal Nehru National Solar Mission (JNNSM) was launched on January 11, 2010, to set up policy and regulatory framework for the promotion of solar energy in the country. As a part of overall strategy, making availability of accurate and reliable solar radiation data was considered as a key element. In order to provide investor grade and bankable solar radiation data, MNRE initiated a Solar Radiation Resource Assessment (SRRA) project, by setting up 115 SRRA stations (51 in Phase-I, 60 in Phase-II and 4 Advanced Measurement Stations) in the country. The SRRA project is implemented by National Institute of Wind Energy (NIWE), Chennai, an autonomous R&D institution under the Ministry of New and Renewable Energy.

Each of the SRRA station is equipped with state-of-art equipment/sensors for measuring solar radiation and associated weather parameters. Configuration of these stations include measurement of

  1. Global Horizontal Irradiance (GHI)
  2. Direct Normal Irradiance (DNI)
  3. Diffuse Horizontal Irradiance (DHI)
  4. Wind Speed and Direction
  5. Ambient Temperature
  6. Relative Humidity
  7. Atmospheric Pressure
  8. Rainfall

Data is sampled every second and averaged over a minute. Average data is transmitted through GPRS mode to a Central Receiving Station (CRS) facility at NIWE, Chennai. Automated data quality control mechanism as per international norms is in place for the quality control of the SRRA data. An international standard calibration facility for the calibration of solar radiation measuring instruments has also been set up. In order to provide the data to solar power developers, policy makers, R&D institutions, a solar policy was announced by the Ministry and the salient points of Solar Data Sharing and Accessibility Policy (SDSAP-2013) is given below.

I. General Policy Guidelines

1. NIWE is responsible for operation and maintenance of SRRA stations as per relevant national/ international protocols. The data collected at the SRRA field stations are transmitted to the CRS at NIWE, Chennai and data is subjected to quality checks and is preserved safely at multiple locations both raw as well as processed data.

2. NIWE to disseminate limited data through website. The following information is made available on the NIWE website:

  1. A map showing all the SRRA stations with tags, which when clicked by the users will pop out a small window to give the stations basic parameters and previous month average values.
  2. Sample data files for a station(NIWE SRRA station).

3.NIWE/NISE authorized to sell the processed data up to 25 SRRA stations to a single buyer (India and foreign nationals / institutes / organizations) and the receipts will be credited in the SRRA account maintained by NIWE. For selling more than 25 SRRA stations, specific permission from the Ministry should be obtained.

4. Data provided to parties would be for their exclusive use only and under no circumstances, these data, in full, part or in any other form, is to be disclosed/distributed/copied/reproduced/transferred to other agencies either electronically or in physical form. Parties procuring data need to submit an undertaking to this effect.

5. MNRE will be the sole and exclusive owner of the data, both raw and processed received from all SRRA stations to the CRS at NIWE, Chennai. Access to the data from SRRA stations will be guided by the following principles: Access to the day to day data to each SRRA site owner for their use subject to the specific signing of Non-Disclosure Agreement (NDA). Publication of data in any form will not be allowed, unless otherwise specified with written permission obtained from the Ministry through NIWE.

6. The following SRRA stations are installed by Maharashtra Energy Development Agency (MEDA), Pune.

  1. Aurangabad
  2. Nanded
  3. Thane
  4. Pune (Manchar)
  5. Washim
  6. Latur

Any buyer interested in procuring the data from these stations,please contact for further details.

General Manager(P G-II),
Maharashtra Energy Development Agency, Pune
ph-020-26614393/26614403

II. Data Policy

1. The unprocessed raw data would be made available only for collaborative work with National and International Institutions to develop solar maps and other value added products with specific permissions from the Ministry. All such solar maps developed and other value added products will be examined by a National Solar Radiation Expert Committee (NSREC) consisting of experts from the Ministry, NIWE, SEC, SECI, IMD, ISRO, IIT and other reputed institutions under the Chairmanship of Joint Secretary (NSM),MNRE.

2. The cost for various SRRA data products are as follows.

Sl.No Data Product Amount ( Rs)* Foreign Users ($)*
Commercial Entities Academic and Research Indian Institutions
1 One minute data (ASCII) -per day (without gap filling) 250 125 10
2 One minute data (ASCII) -per month (without gap filling) 6,250 3,125 125
3 One minute data (ASCII) -per year (without gap filling) 62,500 31,250 1,250
4 Monthly & daily average data - based on one minute data (without gap filling) 2,500 2,500 70
5 Ten minute data (ASCII) -per day (without gap filling) 250 125 10
6 Ten minute data (ASCII) -per month (without gap filling) 6,250 3,125 125
7 Ten minute data (ASCII) -per year (without gap filling) 62,500 31,250 1,250
8 Hourly data (ASCII) -per day (without gap filling) 250 125 10
9 Hourly data (ASCII) -per month (without gap filling) 6,250 3,125 125
10 Hourly data (ASCII) -per year (without gap filling) 62,500 31,250 1,250
11 Hourly (ASCII) -per day ( gap filled) 250 125 10
12 Hourly data (ASCII) -per month ( gap filled) 6,250 3,125 125
13 Hourly data (ASCII) -per year ( gap filled) 62,500 31,250 1,250
14 Monthly and daily average data - per month (based on hourly data - gap filled) PDF report 2,500 2,500 70
15 Monthly Average Data -per month - (based on hourly data- gap filled) PDF report 1,000 500 50

                              *Above charges would be subject to levy of service tax and any other tax / cess levied by the Government from time to time.

           Data from Indian Solar Radiation Atlas

Sl.NoData ProductsAmount (Rs)*
1Annual total (kWh/m2 /yr) GHI, DNI & DHI data set for one co-ordinate/grid code (3x3 km spatial resolution) for individual 16 years - MS-Excel format1000
2Climatological monthly average (kWh/m2 /d) GHI, DNI & DHI data set for one co-ordinate/grid code (3x3 km spatial resolution) based on 16 years data - MS-Excel format10000
3Monthly Average GHI, DNI & DHI data set for one co-ordinate/grid code (3kmX3km spatial resolution) for individual 16 years - MS-Excel format10000

                             *Above charges would be subject to levy of service tax and any other tax / cess levied by the Government from time to time.

The Service tax (at present 15%) any other tax /cess as applicable levied by the Government from time to time is also to be paid along with the above data cost. Data cost including taxes is to be paid in advance.
* The revised price for solar data products is w.e.f. 06.05.2016

3. The cost of data would remain the same even if somebody wants to procure data only for limited number of parameters.

4. Academic / Research organizations procuring SRRA data shall send an authorization letter on organizational letter head duly signed by the Head of the Institution stating that the data procured is for the in house research activities and will not be shared with any other organizations.

5. Buyer's should pay the amount only after satisfying himself about the quality of the data.

6. Under no circumstances money paid will be returned to the buyer.

7. In case, buyer remits the amount, SRRA can provide data for an equivalent alternate period or alternate stations data.

III. Other

1. MNRE would be the final authority to decide on actions / activities under the above policy including implementation mechanism of the project and sharing of responsibility / functions with other organizations of the Ministry, such as NISE and SECI.

2. Under collaborative projects, raw data will be sent to intended receiver through Secured File Transfer Protocol (SFTP). The methodology involves, storing of data in a file which will be locked using a secured password in a secured static IP address. The secured static IP address will be sent to the intended recipient by mail to enable the recipient to access the data and download it for further action. Once the downloading of data is completed and after receiving the confirmation from the recipient, the IP link will be automatically disabled after the six days of creation of SFTP.

3. NIWE would comply with the recommendations of National Solar Radiation Expert Committee (NSREC), as and when constituted by the Ministry to oversee implementation of technical aspects of solar radiation resource measurement activities in the country including various protocols used/ developed for quality checks of the measured data, and developing indigenous capacity to work with satellite images to get solar radiation data.

4. The monthly average data uploaded every month (data product Sl.No.15) on the NIWE/MNRE websites for public dissemination will be archived at NIWE and can be provided to anybody as per the Solar Data Sharing and Accessibility Policy (SDSAP-2013) available in the web site after duly signing of NDA.

  1. Service tax (at present@ 15%) is to be paid as applicable from time to time for the data obtained.
  2. Data cost in full is to be paid in advance along with taxes for obtaining data.
  3. ASCII data will be provided in electronic format (CD or by e-mail only). No hard copies will be provided in the case .PDF reports also will be provided in electronic format only, unless otherwise requested for hard copies.
  4. Request for Data should accompany filled in and stamped Data Purchase Application Form to be sent by e-mail: srra.niwe@nic.in addressed to :
    • The Director General
    • National Institute of Wind Energy (NIWE),
    • Velachery - Tambaram High Road,
    • Pallikaranai,
    • Chennai-600 100
  5. Data cost is to be paid in advance by DEMAND DRAFT in favor of NATIONAL INSTITUTE OF WIND ENERGY, payable at Chennai or through RTGS, details of which are given below.
    • Account Name               : National Institute of Wind Energy (NIWE)
    • Account Number           : 31475293619
    • Bank Name & Address : State Bank of India
    •                                            (07993)-Vellacherry (Chennai)
    •                                            37A, Vellacherry Main Road
    •                                            Chennai, Tamil Nadu - 600042
    • IFS Code                         : SBIN0007993
    • MICR Code                     : 600002085
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