Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and TERRA
TLE Epoch: 2023 5 11.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 05/12/2023   02:24:14   ( -71.58, -42.30) 05/12/2023   02:25:20  ( -71.46, -39.62)   95.27                66
 05/12/2023   03:14:41   (  70.57, 126.72) 05/12/2023   03:14:58  (  70.56, 126.65)    2.99                17
 05/12/2023   04:05:23   ( -70.49, -65.83) 05/12/2023   04:04:22  ( -70.51, -65.77)    2.76                61
 05/14/2023   15:17:53   ( -70.67, 125.76) 05/14/2023   15:19:02  ( -70.66, 125.76)    1.41                69
 05/14/2023   16:08:37   (  70.55, -66.73) 05/14/2023   16:08:25  (  70.58, -66.71)    2.58                12
 05/14/2023   16:59:09   ( -69.94, 101.53) 05/14/2023   16:57:59  ( -69.98, 100.09)   55.16                70
 05/17/2023   04:11:48   ( -70.66, -67.70) 05/17/2023   04:12:28  ( -70.65, -67.65)    2.48                40
 05/17/2023   05:02:32   (  70.54,  99.79) 05/17/2023   05:01:51  (  70.56,  99.87)    3.13                41
 05/19/2023   16:15:12   (  71.27, -69.54) 05/19/2023   16:16:21  (  71.18, -67.87)   60.38                69
 05/19/2023   17:05:43   ( -70.61,  98.90) 05/19/2023   17:05:55  ( -70.60,  98.89)    1.18                12
 05/19/2023   17:56:27   (  70.49, -93.61) 05/19/2023   17:55:18  (  70.50, -93.60)    0.84                69
 05/22/2023   05:08:56   (  70.66,  98.01) 05/22/2023   05:09:56  (  70.65,  97.94)    2.74                60
 05/22/2023   05:59:38   ( -70.57, -94.52) 05/22/2023   05:59:21  ( -70.57, -94.54)    0.66                17
 05/22/2023   06:50:05   (  69.55,  74.33) 05/22/2023   06:48:59  (  69.63,  71.81)   98.03                66
 05/24/2023   18:02:51   (  70.63, -95.43) 05/24/2023   18:03:21  (  70.64, -95.47)    1.66                30
 05/24/2023   18:53:33   ( -70.53,  72.04) 05/24/2023   18:52:46  ( -70.55,  72.06)    2.45                47