For systems like the GOES DCS, a Pseudo Binary Data format has been specified. The Pseudo Binary format called out  is a modified ASCII format utilizing 6 bits of an 8 bit character to represent part of each binary number. For data requiring 12 bit precision, two consecutive modified ASCII characters are needed (6 bits in each byte).  Bits 7 and 8 of each character are a ‘1’ and odd parity bit respectively. Data is always expressed by N characters, each representing N*6 bits of information. Data within a character is transmitted least significant bit first.