hi, i saw your response to this flash question. I saw the cosmos 22286 = tonight and it flashed every two seconds as well. does this have the = same sensor package on it as well 22286 Cosmos 2228 6.0 2.0 7.7 3.8 3.5 9 22 37 .0 59 184 0 3.4 4 8 406 96 466 2.1 63 1852 -1.0 9 23 29 .0 89 100 C 275 3.1 4 8 405 114 405 2.3 68 19 5 30.0 jeff ---------- From: Ed Cannon[SMTP:ecannon@mail.utexas.edu] Sent: Saturday, September 06, 1997 3:28 PM To: SeeSat-D@cds.plasma.mpe-garching.mpg.de Subject: Origin of DMSP 1.9-second flashes, part 2 Pardon me for sending two messages on this, but I just found this, and = it has more detail: http://eosdis.larc.nasa.gov:12000/sensor_documents/ssmi_sensor.html > 3. Instrument Layout, Design, and Measurement Geometry: > > List of Sensors: > > Passive Microwave Radiometer=20 > > Sensor Descriptions: ... > The SSM/I rotates continuously about an axis parallel to the local = spacecraft=20 > vertical at 31.6 rpm .... The scan direction is from the left to the = right=20 > when looking in the forward (F10,F11) or aft(F8) direction of the = spacecraft=20 > with the active scene measurements lying 151.2 deg about the forward (F10,F11)=20 > or aft (F8) direction. This results in a swath width of approximately = 1400 km.=20 > The spin rate provides a period of 1.9 sec during which the spacecraft = sub- > satellite point travels 12.5 km.=20 Slight discrepancy -- this says 31.6 rpm (1.8987 sec/rotation), while = the other=20 document said 31.9 (1.8807 sec). I presume that one of them is a typo. Ed Cannon Austin, Texas, USA 30.3086N, 97.7279W, 165m