# \[Archive\] photoemission

**URL:** <https://forum.spis.org/t/archive-photoemission/622>\
**Category:** SPIS\
**Created:** [6 February 2015 13:22 UTC](https://forum.spis.org/t/archive-photoemission/622 "2015-02-06T13:22:00Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![system](https://forum.spis.org/uploads/default/original/1X/887f7e402a70666bad1816db2c64fefd698b4b0f.png) [@system](https://forum.spis.org/u/system)\
**Post date:** [6 February 2015 13:22 UTC](https://forum.spis.org/t/archive-photoemission/622/1 "2015-02-06T13:22:00Z")

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Message by **Konomi Okamoto** :  
Hello.  
I wonder whether photoemission is taking into account about the angle of a satellite surface and sunlight.  
Does the amount of sun energy change if the satellite surface leans?  
Can I handle this by setting the global parameter, the component of sun direction?  
I hope some advise.

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**Author:** ![system](https://forum.spis.org/uploads/default/original/1X/887f7e402a70666bad1816db2c64fefd698b4b0f.png) [@system](https://forum.spis.org/u/system)\
**Post date:** [9 February 2015 09:14 UTC](https://forum.spis.org/t/archive-photoemission/622/2 "2015-02-09T09:14:00Z")

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Message by **Jean-Charles Mateo-Velez** :  
Hi,  
the photoemission is proportional to the co-sinus of incidence angle, which is controlled by the direction of Sun in global parameters SunX,Y,Z  
whose norm |Sun| is the factor of amplification of the photoemission flux given in local parameters

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**Author:** ![system](https://forum.spis.org/uploads/default/original/1X/887f7e402a70666bad1816db2c64fefd698b4b0f.png) [@system](https://forum.spis.org/u/system)\
**Post date:** [25 February 2015 02:31 UTC](https://forum.spis.org/t/archive-photoemission/622/3 "2015-02-25T02:31:00Z")

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Message by **KONOMI OKAMOTO** :  
Thank you for your reply.  
I found a problem when I set the direction of Sun (0,1,1) in global parameter.  
SPIS can show the 3D visual of model and Sun.I tried some paterns of sun direction. Only when I set (0,1,1), I got wrong 3D visual.  
Is calculations is correct even if the 3D visual is wrong?  
I use the latest SPIS version for windows7.

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**Author:** ![system](https://forum.spis.org/uploads/default/original/1X/887f7e402a70666bad1816db2c64fefd698b4b0f.png) [@system](https://forum.spis.org/u/system)\
**Post date:** [25 February 2015 15:12 UTC](https://forum.spis.org/t/archive-photoemission/622/4 "2015-02-25T15:12:00Z")

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Message by **Jean-Charles Mateo-Velez** :  
if there is a problem it only appears on the 3D view. Chck it with the post pro files (current emission)

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**Author:** ![system](https://forum.spis.org/uploads/default/original/1X/887f7e402a70666bad1816db2c64fefd698b4b0f.png) [@system](https://forum.spis.org/u/system)\
**Post date:** [10 July 2020 12:39 UTC](https://forum.spis.org/t/archive-photoemission/622/5 "2020-07-10T12:39:08Z")

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Closed on 10 July 2020 12:39 UTC