PBO H2O Data Portal : Documentation

1. AIRPORT

This field holds a 1 (TRUE) or 0 (FALSE) depending on whether the station in question is located at an airport.
[UNITS: none, FIELD: One digit integer]

This information was determined by using Google maps.

2. COUNTRY

This field holds the country name where the station is located.
[UNITS: none, FIELD: text]

This information was provided by http://pbo.unavco.org.

3. ELEVATION

This field holds the station elevation.
[UNITS: m, FIELD: Decimal with one degree of precision]

This information was provided by http://pbo.unavco.org.

4. ELEVATION MASK END

This field holds the end value of the recommended station elevation mask.
[UNITS: degrees, FIELD: Decimal with zero degrees of precision]

This value is determined by the GPS reflections group.

5. ELEVATION MASK START

This field holds the start value of the recommended station elevation mask.
[UNITS: degrees, FIELD: Decimal with zero degrees of precision]

This value is determined by the GPS reflections group.

6. ESTABLISHED DATE

This field holds the year that the station was established.
[UNITS: year, FIELD: Four character text]

This value is provided by UNAVCO.

7. GRAZING

This field holds a 1 (TRUE) or 0 (FALSE) depending on whether the station in question is located on grazing land.
[UNITS: none, FIELD: One digit integer]

Aerial and satellite imagery were manually referenced to create this designation

8. IN SITU SM

This field holds a 1 (TRUE) or 0 (FALSE) depending on whether soil moisture has been manually sampled at the station.
[UNITS: none, FIELD: One digit integer]

This value is determined by the GPS reflections group.

9. IN SITU SM DATE

This field holds the date that soil moisture was first manually measured at the station.
[UNITS: yyyy/mm/dd, FIELD: Ten character text]

10. IN SITU VEG

This field holds a 1 (TRUE) or 0 (FALSE) depending on whether vegetation water content has been sampled at the station.
[UNITS: none, FIELD: One digit integer]

11. IN SITU VEG DATE

This field holds the date that vegetation water content was first manually measured at the station.
[UNITS: yyyy/mm/dd, FIELD: Ten character text]

12. L2C DATE RECENT

This field holds the most recent L2C date for the station.
[UNITS: yyyy/mm/dd, FIELD: Ten character text]

This value was calculated by the GPS reflections group.

13. L2C DATE START

This field holds the date that L2C was turned on at the station.
[UNITS: yyyy/mm/dd, FIELD: Ten character text]

This information was provided by the UNAVCO archive.

14. LAND CLASS

This field holds a categorical descriptor for the landcover classification of the station in question.
[UNITS: none, FIELD: Text]

This information was determined by evaluation of photographs and MODIS land cover classifications.

15. LATITUDE

This field holds the station latitude.
[UNITS: decimal degrees, FIELD: Decimal with twelve degrees of precision]

This information was provided by http://pbo.unavco.org.

16. LONGITUDE

This field holds the station longitude.
[UNITS: decimal degrees, FIELD: Decimal with twelve degrees of precision]

This information was provided by http://pbo.unavco.org.

17. MET

This field holds a 1 (TRUE) or 0 (FALSE) depending on whether the station in question has meteorological sensors.
[UNITS: none, FIELD: One digit integer]

This information was provided by http://pbo.unavco.org.

18. MP1

This field holds a categorical descriptor for the MP1 Status of the station in question.
[UNITS: none, FIELD: Text]

This value is determined by the GPS reflections group.

19. MP1 MEAN

This field holds the average MP1 value for the station.
[UNITS: none, FIELD: Decimal with three degrees of precision]

This information was calculated by the GPS Reflections team. Typically it is based on a five year average after snow-contaminated data have been removed.

20. NDVI CORR

This field holds a value representing the station correlation to NDVI.
[UNITS: none, FIELD: Decimal with two degrees of precision]

This value was calculated from a comparison of five years of NDVI data and MP1rms data made by the GPS reflections team. Both time series were cleared for snow. Correlations were calculated for lags between 0 to 5 weeks, and the best correlation is reported.

21. NDVI HIGH

This field holds the maximum observed normalized difference vegetation index (NDVI) value for the station in question.
[UNITS: none, FIELD: Decimal with three degrees of precision]

This information was calculated by the GPS Reflections group, reporting the average of the 95th percentile.

22. NDVI LOW

This field holds the minimum observed normalized difference vegetation index (NDVI) value for the station in question.
[UNITS: none, FIELD: Decimal with three degrees of precision]

This information was calculated by the GPS Reflections group, reporting the average of the 5th percentile.

23. PBO

This field holds a 1 (TRUE) or 0 (FALSE) depending on whether the station in a Plate Boundary Observatory (PBO) site.
[UNITS: none, FIELD: One digit integer]

This information was provided by http://pbo.unavco.org.

24. PRECIP

This field holds the annual precipitation at the station.
[UNITS: mm, FIELD: Decimal with one degree of precision]

PRISM.

25. REFLECTOR HEIGHT

This field holds the nominal reflector height for the station.
[UNITS: m, FIELD: Decimal with three degrees of precision]

This information was calculated by the GPS reflections group.

26. SAMPLING RATE

This field holds the current sampling rate for the station.
[UNITS: sec, FIELD: Two digit integer]

This information was provided by http://pbo.unavco.org.

27. SENSING AREA SNOW

This field holds the snow depth sensing footprint for the station.
[UNITS: m², FIELD: Decimal with one degree of precision]

This information is not currently available.

28. SENSING AREA VEG

This field holds the vegetation water content sensing footprint for the station.
[UNITS: m², FIELD: Decimal with one degree of precision]

This information is not currently available.

29. SITE ID

This field holds the four-character station ID.
[UNITS: none, FIELD: Four character lowercase text]

This information was provided by http://pbo.unavco.org.

30. SITE NAME

This field holds the ten-character longform station name.
[UNITS: none, FIELD: Ten character uppercase text]

This information was provided by http://pbo.unavco.org.

31. SM PRODUCT

This field holds a 1 (TRUE) or 0 (FALSE) depending on whether the station produces a soil moisture product.
[UNITS: none, FIELD: One digit integer]

32. SNOTEL

This field holds a 1 (TRUE) or 0 (FALSE) depending on whether the station in question is co-located with a SNOTEL station.
[UNITS: none, FIELD: One digit integer]

The GPS reflections group calculated which GPS sites were within 25 km of SNOTEL sites.

33. SNOTEL DISTANCE

This field holds the distance between the co-located SNOTEL station and the station in question.
[UNITS: km, FIELD: Decimal with one degree of precision]

This distance was calculated by the GPS reflections group based on station locations provided by SNOTEL.

34. SNOTEL ELEVATION

This field holds the elevation of the co-located SNOTEL station.
[UNITS: m, FIELD: Decimal with one degree of precision]

This information was provided by SNOTEL.

35. SNOTEL ID

This field holds the SNOTEL ID for the co-located SNOTEL station.
[UNITS: none, FIELD: Text]

This information was provided by SNOTEL.

36. SNOWPACK

This field holds a 1 (TRUE) or 0 (FALSE) depending on whether the station accumulates a significant snowpack.
[UNITS: none, FIELD: One digit integer]

37. SNOW PRODUCT

This field holds a 1 (TRUE) or 0 (FALSE) depending on whether the station produces a snow depth product.
[UNITS: none, FIELD: One digit integer]

38. SNR

This field holds a categorical descriptor for the SNR Status of the station in question.
[UNITS: none, FIELD: Text]

This information was provided by http://pbo.unavco.org.

39. SOIL TYPE

This field holds a categorical descriptor for the soil type of the station in question.
[UNITS: none, FIELD: Text]

This information is currently not available.

40. STATE

This field holds the two-character abbreviation for the state where the station is located.
[UNITS: none, FIELD: Two character text]
Special Note: CN/CS = CA North/South

This information was provided by http://pbo.unavco.org.

41. SWE

This field holds modeled annual snow water equivalent (SWE) at the station.
[UNITS: mm, FIELD: Decimal with one degree of precision]

Armstrong, R.L., M.J. Brodzik, K. Knowles, and M. Savoie, Global monthly EASE-Grid snow water equivalent climatology. Boulder, CO: National Snow and Ice Data Center. Digital media. Available at http://nsidc.org/data/nsidc-0271.html, 2005.

42. TEMP CORR

This field holds a value representing the correlation between MP1RMS to NLDAS average temperature.
[UNITS: none, FIELD: Decimal with two degrees of precision]

This information was calculated by the GPS reflections group.

43. TEMP MAX

This field holds a maximum annual air temperature value for the station in question.
[UNITS: degC, FIELD: Decimal with one degree of precision]

This information is calculated from NLDAS temperature data.

44. TEMP MEAN

This field holds a mean annual air temperature value for the station in question.
[UNITS: degC, FIELD: Decimal with one degree of precision]

This information is calculated from NLDAS temperature data.

45. TEMP MIN

This field holds a minimum annual air temperature value for the station in question.
[UNITS: degC, FIELD: Decimal with one degree of precision]

This information is calculated from NLDAS temperature data.

46. THETA RES

This field holds the theta res value for the station.
[UNITS: none, FIELD: Decimal with four degrees of precision]

This value was calculated with Rosetta using input data from STATSGO

47. THETA RES UNCERTAINTY

This field holds the theta res uncertainty value for the station.
[UNITS: none, FIELD: Decimal with four degrees of precision]

This value was calculated with Rosetta using input data from STATSGO

48. THETA SAT

This field holds the theta sat value for the station.
[UNITS: none, FIELD: Decimal with four degrees of precision]

This value was calculated with Rosetta using input data from STATSGO

49. THETA SAT UNCERTAINTY

This field holds the theta sat uncertainty value for the station.
[UNITS: none, FIELD: Decimal with four degrees of precision]

This value was calculated with Rosetta using input data from STATSGO

50. VEG PRODUCT

This field holds a 1 (TRUE) or 0 (FALSE) depending on whether the station produces a vegetation water content product.
[UNITS: none, FIELD: One digit integer]

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