IW = 'IW'
EW = 'EW'
S1 = 'S1'
S2 = 'S2'
S3 = 'S3'
S4 = 'S4'
S5 = 'S5'
S6 = 'S6'
WV = 'WV'
DSN = 'DSN'
FBS = 'FBS'
FBD = 'FBD'
PLR = 'PLR'
WB1 = 'WB1'
WB2 = 'WB2'
OBS = 'OBS'
SIRC11 = '11'
SIRC13 = '13'
SIRC16 = '16'
SIRC20 = '20'
SLC = 'SLC'
STD = 'STD'
POL = 'POL'
RPI = 'RPI'
EH3 = 'EH3'
EH4 = 'EH4'
EH6 = 'EH6'
EL1 = 'EL1'
FN1 = 'FN1'
FN2 = 'FN2'
FN3 = 'FN3'
FN4 = 'FN4'
FN5 = 'FN5'
SNA = 'SNA'
SNB = 'SNB'
ST1 = 'ST1'
ST2 = 'ST2'
ST3 = 'ST3'
ST4 = 'ST4'
ST5 = 'ST5'
ST6 = 'ST6'
ST7 = 'ST7'
SWA = 'SWA'
SWB = 'SWB'
WD1 = 'WD1'
WD2 = 'WD2'
WD3 = 'WD3'