Rocket Lab

Rocket Lab

Electron rocket

Electron general characteristics

  • Carbon composite.
  • LOX and kerosine.
  • Battery hot swap.
  • 1th stage: 9 x sea-level Rutherford engines.
  • 2nd stage: 1 x vacuum Rutherford engine.
  • 3th stage: kick start.
  • Booster recovery.
  • Launch from Mahia, New Zealand (NZ).

Mission for Astroscale (19-02-2024)

  • Electron mission: No. 44
  • Launch date: 19-02-2024
  • Mission name: On Closer Inspection
  • Customer: Astroscale Japan Inc
  • Launch site: Launch Complex 1
  • Payload: ADRAS-J (Active Debris Removal by Astroscale-Japan)
  • Objectives: Space junk removal test.

Mission for Astroscale – Sequence of events (19-02-2024)

Time (T+ hh:mm:ss)EventSpeedAltitudeKero tempKero massLOX tempLOX mass
  km/hkmC%C%
    Stage 2Stage 2Stage 2Stage 2
        
-00:01:56Switch to internal flight computer000100%0100%
-00:01:48FTS enabled000100%0100%
-00:01:25Kerosine loading complete000100%0100%
-00:01:00LOX loading complete000100%0100%
-00:00:47Pressure check both stages000100%0100%
-00:00:20T-20 and counting-callout000100%0100%
-00:00:10LD Countdown to liftoff000100%0100%
-00:00:02Ignition000100%0100%
00:00:00Liftoff000100%0100%
00:01:14MAX Q1.85015n.n.n.n.n.n.n.n.
00:02:26Shutdown stage 1 (MECO)8.00070n.n.n.n.n.n.n.n.
00:02:29Separation stage 1 and 27.90073n.n.n.n.n.n.n.n.
00:02:33Ignition stage 27.90077n.n.n.n.n.n.n.n.
00:03:06Fairing separation8.400110n.n.n.n.n.n.n.n.
00:05:00Telemetry11.5431881659%-17959%
00:06:22Battery hot swap stage 215.249215n.n.n.n.n.n.n.n.
00:08:00Telemetry21.7732221715%-17614%
00:09:03SECO28.576223n.n.n.n.n.n.n.n.
00:09:06Kickstage separation28.576223n.n.n.n.n.n.n.n.
00:09:17Coast phase (eliptical trajectory)28.576223n.n.n.n.n.n.n.n.
00:59:00Curie burn (to final orbit) 1      
01:02:50Curie burn (to final orbit) 2 (30 s)      
01:04:14Payload deployment      

The ‘On Closer Inspection’ mission successfully launched on February 19th NZDT. The mission lifted-off from Rocket Lab Launch Complex 1 in New Zealand and deployed the Active Debris Removal by Astroscale-Japan (ADRAS-J) satellite for Astroscale Japan Inc. The mission is the first phase of an orbital debris removal program, and during this phase ADRAS-J is designed to test technologies and operations for approaching and monitoring debris objects, also known as space junk, and delivering data that will assist in removing it, to ensure the sustainable use of space for future generations.

The 150-kilogram ADRAS-J satellite will approach an aged, derelict rocket stage in orbit to observe it closely, understand how it behaves and determine potential methods for its assisted deorbiting in future. The rocket stage it will be observing is the Japanese H-2A upper stage left in low Earth orbit after the launch of the GOSAT Earth observation satellite in 2009. ADRAS-J will fly around the stage, 11 meters long and four meters in diameter, inspecting it with cameras. After deployment from Electron, Astroscale’s full mission will take between three and six months to complete.

To enable the rendezvous with a non-cooperative space object required a dedicated launch, highly responsive mission planning and extremely tight margins on orbital parameters. Rocket Lab only received the final perigee, apogee, and inclination from Astroscale 20 days before launch. Only then could argument of perigee targets for different days within the 14-day window be selected, essentially determining the timing of Electron Kick Stage burns to facilitate the unique elliptical orbit required depending on the launch date. The mission also demanded highly accurate orbital insertion with tighter margins than required on most standard missions. In addition, the exact T-0 was only defined the day prior to launch and the required LTAN accuracy only allowed for +/- 15 seconds.

ADRAS-J in lab
ADRAS-J in lab
Rocket Lab Electron launch 19-02-2024
Rocket Lab Electron launch 19-02-2024
ADRAS-J
ADRAS-J

Neutron rocket

Characteristics

  • First launch in 2024

Footnotes

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