Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 7 8.  Predictions up to the next  14.0 days:

     Date     Time(NPP) NPP Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 07/08/2021   16:41:02   ( -68.71, 107.87) 07/08/2021   16:41:59  ( -68.68, 107.85)    3.31                57
 07/08/2021   17:31:46   (  68.57, -84.65) 07/08/2021   17:31:26  (  68.57, -84.64)    1.05                20
 07/08/2021   18:22:16   ( -67.85,  83.60) 07/08/2021   18:21:06  ( -67.90,  82.20)   59.02                70
 07/11/2021   08:07:34   (  69.68,  54.95) 07/11/2021   08:08:41  (  69.56,  57.24)   89.57                67
 07/11/2021   08:57:58   ( -68.64,-136.27) 07/11/2021   08:58:26  ( -68.62,-136.34)    3.26                28
 07/11/2021   09:48:42   (  68.51,  31.20) 07/11/2021   09:47:53  (  68.51,  31.17)    1.64                49
 07/14/2021   00:24:13   (  68.71, 172.07) 07/14/2021   00:25:22  (  68.72, 172.03)    1.92                69
 07/14/2021   01:14:55   ( -68.63, -20.49) 07/14/2021   01:14:52  ( -68.62, -20.46)    1.71                 3
 07/14/2021   02:05:35   (  68.29, 147.26) 07/14/2021   02:04:22  (  68.33, 146.83)   18.18                73
 07/16/2021   16:41:10   (  68.71, -72.15) 07/16/2021   16:41:48  (  68.71, -72.10)    2.04                38
 07/16/2021   17:31:51   ( -68.57,  95.35) 07/16/2021   17:31:19  ( -68.55,  95.34)    1.85                32
 07/19/2021   08:07:30   ( -69.25,-124.44) 07/19/2021   08:08:40  ( -69.14,-123.31)   46.15                70
 07/19/2021   08:58:05   (  68.65,  43.69) 07/19/2021   08:58:14  (  68.63,  43.69)    1.97                 9
 07/19/2021   09:48:46   ( -68.51,-148.80) 07/19/2021   09:47:44  ( -68.53,-148.80)    2.98                62
 07/22/2021   00:24:17   ( -68.72,  -7.94) 07/22/2021   00:25:13  ( -68.74,  -7.95)    2.13                56
 07/22/2021   01:15:01   (  68.60, 159.53) 07/22/2021   01:14:40  (  68.61, 159.54)    1.51                21
 07/22/2021   02:05:31   ( -67.86, -32.21) 07/22/2021   02:04:21  ( -67.90, -33.67)   61.08                70