### Instruction:

Extract the cause and effect entities from the following sentence:
For the IRS: A spectral sounding is deemed a missing sounding if either no measurement has been returned or a fraction of the spectral channels greater than M, within the considered spectral band, have associated radiance samples where the difference between the radiometric error and the radiometric accuracy is more than N times the specified radiometric noise, for a specific repeat cycle

### Assistant:

NOT_RELEVANT: for a specific repeat cycle
VARIABLE: the difference between the radiometric error and the radiometric accuracy
CONDITION: is more than N times the specified radiometric noise
KEYWORD: where
OR: or
NEGATION: no
EFFECT_1: A spectral sounding is deemed a missing sounding
CAUSE_1: no measurement has been returned
CAUSE_2: a fraction of the spectral channels greater than M, within the considered spectral band, have associated radiance samples
CAUSE_3: the difference between the radiometric error and the radiometric accuracy is more than N times the specified radiometric noise

