Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 5 2.  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)
 05/03/2023   23:00:53   (  70.65,-169.94) 05/03/2023   23:02:02  (  70.54,-168.61)   50.56                69
 05/03/2023   23:51:25   ( -70.04,  -1.66) 05/03/2023   23:51:39  ( -70.04,  -1.70)    1.60                14
 05/04/2023   00:42:09   (  69.92, 165.84) 05/04/2023   00:41:06  (  69.94, 165.80)    2.69                63
 05/06/2023   15:17:40   (  70.13, -53.35) 05/06/2023   15:18:35  (  70.11, -53.35)    2.30                55
 05/06/2023   16:08:21   ( -69.99, 114.18) 05/06/2023   16:08:05  ( -69.99, 114.12)    2.09                16
 05/06/2023   16:58:52   (  69.18, -77.33) 05/06/2023   16:57:44  (  69.22, -79.28)   76.92                68
 05/09/2023   07:34:36   (  70.09,  62.47) 05/09/2023   07:35:00  (  70.09,  62.51)    1.47                24
 05/09/2023   08:25:17   ( -69.95,-130.00) 05/09/2023   08:24:30  ( -69.97,-130.02)    3.09                47
 05/11/2023   23:00:47   ( -70.17,  10.80) 05/11/2023   23:01:57  ( -70.15,  10.85)    2.94                70
 05/11/2023   23:51:31   (  70.05, 178.28) 05/11/2023   23:51:24  (  70.04, 178.33)    2.58                 7
 05/12/2023   00:42:09   ( -69.75, -13.95) 05/12/2023   00:40:56  ( -69.82, -14.34)   16.86                73
 05/14/2023   15:17:42   ( -70.09, 126.69) 05/14/2023   15:18:22  ( -70.07, 126.63)    2.41                40
 05/14/2023   16:08:26   (  69.97, -65.83) 05/14/2023   16:07:49  (  69.96, -65.88)    2.50                37