CO2 SNOW CLEANING
Gain per cleaning session in pre-washing era (August 98 - March00):
R400nm R700nm SC400nm SC700nm
4m tel. +0.35% +0.38% -0.24% -0.32%
1.5m tel. +0.70% +0.71% -0.20% -0.41%
We do bi-weekly sessions at 4m and monthly sessions at 1.5m tel:
=> Refl. can wait one month to be recovered but scat. can not.
=> CO2 helps maintaining mirrors cleaner between washings.