AIRGLOW DATA

                            for April 1991

Station:    Kiso                                          Radiation : 5577A

Longitude:137ß38'E

Latitude: 35ß48'N

                      Absolute Zenith Intensity in Rayleighs
J.S.T         18    19    20    21    22    23     0     1     2     3     4     5     6
Date/U.T.      9    10    11    12    13    14    15    16    17    18    19    20    21       Sum   Ave
1991                                                                                          1991
Apr.                                                                                          Apr.
5- 6                       *     *     *   180                                                 180     1   180
9-10                     175   195   180   205   165   165   135                              1220     7   174
11-12                      *  100:   140   160   180   210   190   175                        1155     7   165
14-15                    165   155   240   300   290   260   255   285                        1950     8   244
15-16                   205:     *     *     *     *  215:   310   385                        1115     4   279
                                                                                              1240     6   207
16-17                            *   165   190   180   200   235   270                        1165     4   291
19-20                                            310   250   295   310                        1020     3   340
20-21                                                  330   365   325                         775     3   258
21-22                                                  290   225   260                        9820    43   228
                                                                                                        66.2949

Remarks : # Extrapolated or interpolated value from measurements within 10 minutes
          * Interrupted by accident or cloud  : Poor value  -- Moon shine