Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 7 7.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 07/09/2023   15:17:32   (  70.05, -53.31) 07/09/2023   15:18:34  (  70.05, -53.34)    1.41                62
 07/09/2023   16:08:14   ( -69.96, 114.15) 07/09/2023   16:08:04  ( -69.94, 114.13)    2.23                10
 07/09/2023   16:58:49   (  69.37, -77.68) 07/09/2023   16:57:39  (  69.40, -78.97)   50.63                70
 07/12/2023   07:34:25   (  70.04,  62.49) 07/12/2023   07:35:04  (  70.06,  62.54)    2.67                39
 07/12/2023   08:25:07   ( -69.94,-130.05) 07/12/2023   08:24:34  ( -69.95,-129.98)    2.56                33
 07/14/2023   23:00:48   ( -70.87,   9.63) 07/14/2023   23:01:55  ( -70.79,  11.87)   82.15                67
 07/14/2023   23:51:17   (  69.99, 178.35) 07/14/2023   23:51:35  (  69.98, 178.32)    1.45                18
 07/15/2023   00:41:59   ( -69.88, -14.18) 07/15/2023   00:41:05  ( -69.87, -14.20)    1.70                54
 07/17/2023   15:17:26   ( -70.09, 126.66) 07/17/2023   15:18:37  ( -70.10, 126.72)    2.45                71
 07/17/2023   16:08:09   (  69.94, -65.80) 07/17/2023   16:08:05  (  69.93, -65.87)    2.55                 4
 07/17/2023   16:58:49   ( -69.73, 101.83) 07/17/2023   16:57:36  ( -69.77, 101.54)   11.99                73
 07/20/2023   07:34:17   ( -70.04,-117.49) 07/20/2023   07:35:06  ( -70.03,-117.49)    1.89                49
 07/20/2023   08:25:00   (  69.90,  50.04) 07/20/2023   08:24:33  (  69.91,  50.00)    2.64                27