... WFC3 Data Handbook > Chapter 2: WFC3 Data Structure > 2.4 Headers and Keywords . ... The third column gives the format used for the value of the keyword: "L" for boolean values, "C" for characters, "R" for real values and "I" for integer values, followed by the precision of the value. ... The pattern keywords refer to the WFC3 dithering patterns available which are discussed in greater detail in Section 4.2 . ... Keyword . ... number of data axes . ... angle between sun and V1 axis . ... C08 . ...