Definition of Fiber Mask flag for LAMOST DR11

Option: 0 (0=show all flags, x=hexadecimal)

0 Fiber not allotted (NOALLOTTED)
1 Bad trace from the routine TRACECENTER (BADTRACE)
2 Low counts in flat field (BADFLAT)
4 Bad arc solution (BADARC)
8 >10% pixels are bad on CCD (MANYBADPIXEL)
16 >10% pixxels are saturated (SATURATED)
32 Whopping fiber (WHOPPER)
64 Near a whopping fiber (NEARWHOPPER)
128 Sky fiber shows extreme residuals (BADSKYFIBER) 

function compute_q2M(value) {
  var q2M = (value>>22)&7;
  return "2MASS Quality flag = <b>" + "ABCDEFG ".substr(7-q2M, 1) + "</b></td><td>&nbsp;";
}