Meteo sensor

[Pawel Lejba]

Dear Colleagues,

Borowiec plan to exchange the meteo station. What would you recommend to us ? We have an experience with Vaisala. What is a price of your professional meteo sensor you are using ? I will be very gratefull for any replies.

Kind regards,
Pawel

[pywang]

In Graz, we have:

1) MET3A from Paroscientific, delivering all 3 meteorological parameters for standard ranging, since long time;

2) PTU301 from Vaisala, bought in 2015, for SP-Dart (hopefully you know what is SP-Dart  )

We made a 4-days pressure data comparison between MET3A and PTU301, 1 sample /minute, we got::

----Average of differences= 0.062 mBar (MET3A< PTU301 )
----RMS of differences       = 0.044 mBar

In addition, we have another barometer also from Paroscientific (Model 740-16B) in our laser room.
The difference between MET3A and 740-16B is checked always when starting a pass, and a difference of > 0.3 mbar will be reported as a warning, just to avoid any hardware/software/artificial accidents.

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In 2015, we also made a market investigation:

1) Paroscientific provides MET4(~8.3k Euros) and MET4A (with fan-aspired, (~9,0k Euros)
2) Vaisala PTU301, about 2.6k Euros excl. tax
3) Climatronics(USA), ALLinONE (even include wind info.), about 2.5k dollors. Needs to be checked / tested.

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By the way, please remember that SLR expects the pressure value at the system invariant point (crossing of Az /EL axis in the telescope).

Graz has measured the pressure difference between this system invariant point and the location of the sensor; this difference (a constant value) is applied to all  measurements of  air pressure.

[Pawel Lejba]

Thanks !