[GRASS-dev] [GRASS GIS] #3052: Watts to MegaJoules/Day conversion issue

GRASS GIS trac at osgeo.org
Wed Jun 1 11:33:03 PDT 2016


#3052: Watts to MegaJoules/Day conversion issue
--------------------------+-------------------------
  Reporter:  cholmes      |      Owner:  grass-dev@…
      Type:  defect       |     Status:  new
  Priority:  normal       |  Milestone:  7.0.5
 Component:  Imagery      |    Version:  unspecified
Resolution:               |   Keywords:  i.evapo.mh
       CPU:  Unspecified  |   Platform:  All
--------------------------+-------------------------

Comment (by ychemin):

 article is here for file mh_eto.c :

 https://www.researchgate.net/profile/Peter_Droogers/publication/226830392_Estimating_Reference_Evapotranspiration_Under_Inaccurate_Data_Conditions/links/0f31753a0483fd97c0000000.pdf

 ref to equation 5 page 40.

 equation 1 page 36 references the units used: RA-> MJ / m2 / d

 MegaJoules per meter square per day.

 So the conversion is indeed wrong in the ticket.

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Ticket URL: <https://trac.osgeo.org/grass/ticket/3052#comment:2>
GRASS GIS <https://grass.osgeo.org>



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