Korea loads half of its 10-satellite NEONSAT constellation onto Nuri's fifth flight

Releasing five identical primaries one after another leaves little slack in the timing. NEONSATs 2 through 6 go out 35 to 40 seconds apart, and the upper stage turns about 45 degrees between each release to prevent collisions ^[2]. Four gaps of that length take 140 to 160 seconds ^[19]. The 10 CubeSats then leave in pairs at 10-second intervals ^[3]. That is four more gaps and 40 more seconds, so the separations alone run at least three minutes ^[19]. Deployment begins between 810 and 960 seconds after liftoff at about 575 kilometers, and the flight ends roughly 20 minutes after liftoff with a collision-avoidance maneuver and a fuel vent ^[4][5].

That timing tests the hardware. A launch rate needs a second date, and the only one in the reports is the sixth flight, set for next year with the other five NEONSATs ^[9]. The clean outcome is all five primaries in orbit this week and flight six on time, completing the set. A slip in flight six would leave half a constellation in orbit ^[17]. A failed sequential release would put the problem in the deployment method before the calendar matters at all.

I think the case for a regular Korean launch schedule stays open until flight six leaves the pad. The counter-case is this week's discipline. According to Sedaily, the 15-satellite manifest is a record ^[6]. Oh Tae-seok, the KASA administrator, said the launch management committee reviewed technical readiness, weather, the space environment and the chance of collision with space objects, and found all launch conditions met ^[13]. "Launch preparations are proceeding normally according to the planned schedule," Oh said ^[14]. "We decided to proceed with the fifth launch of the Nuri rocket as scheduled today," he said ^[15]. If flight six slips past next year, the routine-launch case fails, however this flight goes.

For investors in Korea's space suppliers, the evidence so far is engineering. The five primaries weigh under 500 kilograms together ^[18]. They are built to watch the Korean Peninsula and surrounding areas for national security and disaster response ^[16]. The launch coverage does not include a launch price, a contract value or the names of the companies that built the rocket and satellites. Nuri's next scheduled flight already has a booked payload, the remaining five NEONSATs ^[9].