Log Book Entry No.161

Created: 17 Jan 2018 12:48:38

Last Revised: 17 Jan 2018 12:48:38

SarahHughes

PH3010 Solar Limb Darkening

• set timer to 405 seconds, (exp:1/4000s, gain:1023)
• Aim to take drift scans using all filter
• speed set to 3, lots of high cloud cover, image observed darkening in the live capture window
• moved 20 secs in speed 3 to west of sun
• terrestrial on and sequence timer started
• drift scan taken with normal filter with lots of cloud (exp:1/4000s, gain:1023)
• error scan taken at centre with cloud (exp:1/2959s, gain:1023)
• error scan taken at centre with blue filter with clouds (exp: 1/218, gain:1023)
• (forgot to change filename prefix however frames are in correct folder)
• error scan taken at centre with green filter (exp: 1/618, gain:1023)
• error scan taken at centre with red filter (exp: 1/1477, gain:1023)
• repeating the error scan with red filter due to concerns of position of the dome (exp:1/1477, gain:1023)
• despite intermittent cloud, drifts scans to be done to obtain bad data.
• drift scan taken with red filter with lots of cloud (exp:1/1477s, gain:1023)
• drift scan taken with red filter with lots of cloud (exp:1/618s, gain:1023)
• considerable cloud cover (sun no longer visible in parts)