Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 6 27.  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)
 06/28/2023   23:00:44   ( -70.13,  10.80) 06/28/2023   23:01:56  ( -70.13,  10.90)    3.77                72
 06/28/2023   23:51:27   (  69.96, 178.36) 06/28/2023   23:51:24  (  69.98, 178.32)    2.05                 3
 06/29/2023   00:42:08   ( -69.82, -14.11) 06/29/2023   00:40:55  ( -69.82, -14.27)    6.27                73
 07/01/2023   15:17:37   ( -70.09, 126.63) 07/01/2023   15:18:31  ( -70.08, 126.68)    2.29                54
 07/01/2023   16:08:21   (  69.98, -65.89) 07/01/2023   16:07:58  (  69.97, -65.82)    3.03                23
 07/01/2023   16:58:49   ( -69.14, 102.64) 07/01/2023   16:57:40  ( -69.21, 100.78)   73.92                69
 07/04/2023   07:34:30   ( -70.06,-117.55) 07/04/2023   07:35:05  ( -70.06,-117.47)    2.72                35
 07/04/2023   08:25:13   (  69.90,  50.00) 07/04/2023   08:24:33  (  69.90,  49.94)    2.21                40
 07/06/2023   23:00:52   (  70.72,-170.13) 07/06/2023   23:02:00  (  70.62,-168.42)   63.81                68
 07/06/2023   23:51:22   ( -69.98,  -1.66) 07/06/2023   23:51:40  ( -69.97,  -1.73)    3.17                18
 07/07/2023   00:42:06   (  69.88, 165.80) 07/07/2023   00:41:07  (  69.86, 165.76)    2.84                59
 07/09/2023   15:17:32   (  70.07, -53.34) 07/09/2023   15:18:42  (  70.07, -53.35)    0.64                70
 07/09/2023   16:08:14   ( -69.97, 114.14) 07/09/2023   16:08:12  ( -69.97, 114.14)    0.63                 2
 07/09/2023   16:58:54   (  69.66, -78.09) 07/09/2023   16:57:42  (  69.70, -78.60)   20.08                72