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Statistics on Access to the SoDa Service

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- Number of unique visitors using the SoDa website (per year)
icon This graph exhibits the success of the SoDa Service since its introduction in 2002. It gives the number of unique visitors to the SoDa Service using the website (no automatic access).
- Number of visits to the SoDa website (per year)
icon This graph exhibits the number of total visits received every year by the SoDa Service using the website (no automatic access), since its introduction in 2002.
- Number of automatic accesses to the HelioClim data (per year, in million of requests)

This graph depicts the yearly number of requests of automatic accesses (machine-to-machine accesses, wget or curl command) to the HelioClim databases (HC1, HC3) since the introduction of the SoDa website in 2002. In the first months of 2011, the duplication of the acquisition chain at Transvalor premises, in Mougins, France, enables a better service, and wget access to our Customers.

In 2011, more than 1 750 000 automatic requests were made to the HelioClim databases. In 2012, this number exceeds 2.5 millions.

- Number of requests for each service in 2011 and 2012

click on the images to get the numbers

Number of requests for each service made by different customers. We have excluded the requests performed by Mines ParisTech and Transvalor for research purposes.

Total number of requests in 2011 was 90 540, with 5 435 different users. In 2012, the total number of requests is 396 599 for a number of 6 283 users.

- Number of ordered maps since Apr. 2009

Transvalor S.A. is in charge of the SoDa website since April 2009. Since then, the whole European country and the northern part of Africa have been mapped (GHI or BNI, yearly and/or monthly averages).

- Number of ordered HelioClim time series requests

click on the images to get the numbers

Transvalor S.A. is in charge of the SoDa website since April 2009. Since then, 116 time series have been ordered by a one-shot request.

- Providers of SoDa services
Among the 59 free services available on the SoDa website:
  • ENTPE (France) provides 5 free webservices (9 %)
  • Meteotest (Switzerland): 5 (9 %)
  • NASA (USA): 2 (3 %)
  • NCEP (USA): 1 (2 %)
  • ISAC (Italy): 2 (3 %)
  • Mines ParisTech (France): 44 (75 %)
- Number of other one-shot requests

ex: TMY
Service 2009 2010 2011 2012
Compute hourly DNI from GHI_h on 111 sites 1 - - -
Calibration - 2 - 5
Typical Meteorological Year (TMY) - 2 8 8
HelioClim1 daily values for 400 locations in a single order - 1 - -
Computation of monthly average GHI and DHI for 36646 French cities in a single order - - 1 -
Computation of hourly HelioClim1 times series from HC1day for 38 locations in a single order - - 1 -
Extraction of a volume of HelioClim data - - - 2
Provision of routines (in C, Matlab, ...) - - - 1

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Number of requests for each service through the SoDa website and for the year 2011

Astronomy Sun / Earth geometry 2011 2012
Solar declination, Earth/Sun distance, difference TST/MST 87 210
Daylength - Sunrise and Sunset 373 494
Position of the Sun in the Sky (applet Java) unknown unknown
Extraterrestrial and ToA radiation
Extraterrestrial irradiance (E0), i.e. received by a plane normal to sun rays and outside the atmosphere 49 62
Top of Atmosphere (ToA) radiation, i.e. received by a horizontal surface and outside the atmosphere 67 90
Climate Climatic averages
Monthly Averages of Air Temperature (30 years, interpolated values) 1167 804
Monthly means of Solar Radiation, Temperature and Relative Humidity (15 years, 1990-2004) 991 1910
Climatic normals
Normal Year - Global Radiation and Air Temperature (synthesized time-series) 1327 3510
Monthly, Daily or Hourly Typical Values for UV 88 543
Degree days
below a given temperature 273 379
above a given temperature 47 121
Frequency of types of sky
Clearsky, intermediate, or cloudy 52 494
Typical values for clear skies - Linke Turbidity factor
Monthly Values of Linke Turbidity Factor 3847 1425
Linke Turbidity Factor: Monthly maps unknownunknown
Simulation of Hourly Irradiation for One Clear-Sky Day308 193934
Energy - Daylighting Performance of a solar water heater
Averaged Yearly Performance of a Solar Water Heater110 77
Optimal panel orientation
Slope leading to maximum total irradiation 156 140
Daylighting
Potential of Daylight in a Roomunknownunknown
Environnement Photosynthesis in the ocean
Time-series of Photosynthetically Available Radiation (PAR) at sub-surface 10 75
Vertical profile of PAR for a day 9 18
Geography Coordinate of a city
Find the latitude and longitude in degrees of any city 1364 1782
Altitude of a point (databases: SRTM, GTOPO30 and TB5)
of a point for 3 databases: SRTM (90 m), GTOPO30 (1 km) and TB5 (10 km) 315 143
Meteorology Weather forecast
World - Forecasts NCEP 51 200
Europe - Grid size 21 km unknownunknown
italy-centered region - Grid size 10 km unknownunknown
UV and spectral distribution
UV from HelioClim-1 108 1328
Solar radiation data HelioClim and NASA-SSE data for free
HC1month 6819 102275
HC1week 158 373
HC1day 855 1274
HC1monthDNI 1781 1843
NASA-SSE 21045 1115
NASA-SSE-HC1 1079 1371
HC3v2month 1230 235
HC3v2week 50 48
HC3v2day 324 99
HC3v2hour 1649 2456
HC3v2_15 1619 653
HC3v2monthIncl 3223 1945
HC3v2dayIncl 412 433
HC3v2hourIncl 1215 1500
HC3v2_15Incl 577 268
HC3v2monthDNI 720 197
HC3v2dayDNI 292 208
HC3v2hourDNI 1105 820
HC3v2_15DNI 539 305
HC3v3month 539 1535
HC3v3week 11 50
HC3v3day 70 299
HC3v3hour 563 1686
HC3v3_15 0 558
HC3v3monthIncl 507 1418
HC3v3dayIncl 44 384
HC3v3hourIncl 272 1889
HC3v3_15Incl 0 577
HC3v3monthDNI 225 5495
HC3v3dayDNI 35 161
HC3v3hourDNI 213 1125
HC3v3_15DNI 0 256
HelioClim for registered users
HC3v2month 4791 1582
HC3v2week 1052 1449
HC3v2day 147 72
HC3v2hour 6609 203
HC3v2_15 7977 44824
HC3v2monthIncl 714 710
HC3v2dayIncl 789 204
HC3v2hourIncl 1526 161
HC3v2_15Incl 75 1
HC3v2monthDNI 98 28
HC3v2dayDNI 76 44
HC3v2hourDNI 55 14
HC3v2_15DNI 13 0
HC3v3month 909 1615
HC3v3week 1 2
HC3v3day 147 331
HC3v3hour 4747 635
HC3v3_15 31 143
HC3v3monthIncl 1177 1676
HC3v3dayIncl 380 1462
HC3v3hourIncl 195 1315
HC3v3_15Incl 31 110
HC3v3monthDNI 221 207
HC3v3dayDNI 44 34
HC3v3hourDNI 278 185
HC3v3_15DNI 119 75
Units - Converter Sexagesimal degrees and decimals
Sexagesimal Degrees into Degrees with Decimals 281 84

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Number of ordered HelioClim time series

Horizontal Plane
global radiation
Inclined Plane
global, direct, diffuse
Plane normal to sun rays (DNI)
global, direct, diffuse
Month 2010: 5
2011: 4
2012: 6
2009: 2
2010: 14
2011: 3
-
Week - - -
Day 2011: 1 2010: 7
2011: 1
2012: 4
-
Hour 2010: 2 2010: 4
2011: 7
2012: 12
2010: 9
2011: 1
2012: 16
1 min to 30 min 2011: 1 2011: 2
2012: 9
2010: 2
2012: 3

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