Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 6 23.  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)
 06/23/2023   15:17:42   (  70.07, -53.36) 06/23/2023   15:18:19  (  70.07, -53.29)    2.55                37
 06/23/2023   16:08:23   ( -69.93, 114.18) 06/23/2023   16:07:49  ( -69.96, 114.19)    3.14                34
 06/26/2023   06:44:03   ( -70.76,-105.98) 06/26/2023   06:45:11  ( -70.68,-104.15)   67.84                68
 06/26/2023   07:34:35   (  70.02,  62.50) 06/26/2023   07:34:48  (  70.03,  62.54)    1.90                13
 06/26/2023   08:25:17   ( -69.93,-130.05) 06/26/2023   08:24:18  ( -69.92,-129.98)    2.67                59
 06/28/2023   23:00:44   ( -70.09,  10.86) 06/28/2023   23:01:50  ( -70.07,  10.84)    1.89                66
 06/28/2023   23:51:28   (  69.98, 178.34) 06/28/2023   23:51:17  (  69.96, 178.33)    2.13                11
 06/29/2023   00:42:03   ( -69.51, -13.66) 06/29/2023   00:40:52  ( -69.58, -14.56)   35.93                71
 07/01/2023   15:17:36   ( -70.05, 126.70) 07/01/2023   15:18:17  ( -70.03, 126.68)    2.15                41
 07/01/2023   16:08:20   (  69.94, -65.84) 07/01/2023   16:07:44  (  69.91, -65.84)    3.27                36
 07/04/2023   06:43:57   (  70.65,  74.21) 07/04/2023   06:45:06  (  70.55,  75.70)   56.04                69
 07/04/2023   07:34:29   ( -70.02,-117.48) 07/04/2023   07:34:44  ( -70.01,-117.45)    1.29                15
 07/04/2023   08:25:13   (  69.92,  49.98) 07/04/2023   08:24:11  (  69.89,  50.03)    3.15                62
 07/06/2023   23:00:39   (  70.05,-169.08) 07/06/2023   23:01:41  (  70.07,-169.11)    2.31                62
 07/06/2023   23:51:21   ( -69.94,  -1.60) 07/06/2023   23:51:11  ( -69.97,  -1.62)    2.93                10
 07/07/2023   00:41:56   (  69.37, 166.55) 07/07/2023   00:40:46  (  69.40, 165.26)   50.91                70