Table 3.
Kilauea east rift zone SO2 emission rates - Tripod-based

  Date   SO2 (t/d)    SD    WS     WD      N     plume distance by:    Data code

04/16/98   1380      340    6.7    24     16   flown under similar winds    A
04/17/98   1230      290    8.2    31     20           flown                A
07/28/99   960*      310    7.4    32     27           flown                A
09/13/99     40       10    8.3    25     11         estimated              C
09/16/99     40        5    5.0    35      2         estimated              C
09/23/99    190       80    8.6    14     14           flown                A
10/05/99    350      120    6.0    29     17           flown                C
10/28/99   800*      290    5.6    10     23           flown                B
11/17/99   240*       70    6.7     5     40           flown                B

Data quality codes:
A - Best quality data - with distance to plume less than 1 km, and good constraint on measurement of distance; steady wind direction resulting in COSPEC angle consistently orthogonal to plume.
B - Good quality data - somewhat longer distance to plume from measurement site; may have variable wind conditions resulting in COSPEC angle occasionally non-orthogonal to plume.
C - Acceptable data - may have used indirect method to estimate distance to plume; measurements may have been made under less consistent wind conditions. Local terrain and increased plume distance may compromise measurement geometry.

* - includes flat and sideways oriented scans