1 1 SIGMA-0 MEASUREMENT IS NOT USABLE 2 2 SIGNAL TO NOISE RATIO IS LOW 3 3 SIGMA-0 IS NEGATIVE 4 4 SIGMA-0 IS OUTSIDE OF ACCEPTABLE RANGE 5 5 SCATTEROMETER PULSE QUALITY IS NOT ACCEPTABLE 6 6 SIGMA-0 CELL LOCATION ALGORITHM DOES NOT CONVERGE 7 7 FREQUENCY SHIFT LIES BEYOND THE RANGE OF THE X FACTOR TABLE 8 8 SPACECRAFT TEMPERATURE IS BEYOND CALIBRATION COEFFICIENT RAN" GE 9 9 NO APPLICABLE ALTITUDE RECORDS WERE FOUND FOR THIS SIGMA-0 10 10 INTERPOLATED EPHEMERIS DATA ARE NOT ACCEPTABLE FOR THIS SIGM" A-0