Bolometric night sky temperature and subcooling of telescope structures

Free Access

Table 1.

Test of the extreme conditions at Cerro Paranal and at Mauna Kea: T_sky obtained using Eqs. (1) and (2) as well as for the individual sky models from Figs. 4 and 5.

Date	T_amb	PWV	T_sky	T_sky Eq. (2)
	[°C]	[mm]	[°C]	[°C]	[°C]
Cerro Paranal:
8 Jul 2018	16.8	1.05 ^(a)	−28.9	−28.6	−26.8
20 Jul 2018	3.8	0.52 ^(a)	−42.6	−46.2	−44.5

Mauna Kea:
4 Oct 2018	6.9	2.29^(b)	−38.2	−33.4	−36.7
2 Feb 2018	−8.0	1.27^(b)	−53.5	−52.2	−51.8

Notes.

^(a)

Measurement with L-HATPRO radiometer.

^(b)

Taken from GDAS model.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.