The HTV-1 Mission is the first flight of the H-II Transfer Vehicle (HTV) that is designed, developed and built in Japan.
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HTV-1 Mission
News
HTV-1 reentered the atmosphere / HTV-1 mission completed （November 2, 2009）
Following the third de-orbit maneuver, the HTV-1 has reentered the atmosphere at around 6:26 a.m. November 2, from 120 km above New Zealand, and it concluded the HTV-1 Mission, the maiden flight of Japan's unmanned cargo transfer vehicle to the ISS.
*All times are Japan Standard Time (JST)
The purpose of HTV-1 Mission
The HTV-1 Mission, HTV’s first flight to the ISS, has two major objectives: one is to deliver supplies to the ISS and the other is to verify HTV's rendezvous flight techniques and operability of the HTV onboard systems during its actual flight. For this reason, this HTV maiden flight vehicle is also called a "Technical Demonstration Vehicle". The HTV-1 Mission will perform the following technical/engineering demonstrations while transporting supplies and cargo to the ISS:
- Demonstration of HTV’s rendezvous flight operations
- Verification of HTV’s safety and flight control technology
- Demonstration of durability and robustness of the HTV structures on orbit
- Verification of HTV’s avionics and propulsion system components (more than 800,000 parts)
- Demonstration of astronaut’s ingress to the HTV pressurized section during the docked phase
Payload
SMILES loaded to the EP
The HTV-1 Mission will deliver approximately 4.5 tons of cargo to the ISS.
On the HTV-1 Mission, the HTV will carry additional propellants and batteries since demonstration tests are scheduled during the mission. Therefore, the cargo carried on the HTV-1 Mission is less than the standard mass capacity of the HTV.
Schedule
| Mission Details | ||
|---|---|---|
| HTV Flight Number | HTV-1 (maiden flight) | |
| Vehicle | Technical Demonstration Vehicle | |
| Launch | September 11, 2009 2:01 a.m. (JST) | |
| Launch Site | Launch Pad 2 (LP2), Tanegashima Space Center (TNSC) | |
| Capture by the SSRMS | September 18, 2009 4:51 a.m. (JST) | |
| Berthing to the ISS | September 18, 2009 7:27 a.m. (JST) | |
| Unberthing by the SSRMS | October 31, 2009 0:02 a.m. (JST) | |
| Separation from the ISS | October 31, 2009 2:32 a.m. (JST) | |
| Reentry | November 2, 2009 6:26 a.m. approx. (JST) | |
| Mission Duration | Approx. 52 days | |
| Altitude | Insertion：200 km × 300 km (elliptical orbit) Rendezvous：Approx. 350 km |
|
| Inclination | 51.6 degrees | |
| Payload | Pressurized Logistics Carrier (PLC) |
Supplies for onboard use HTV Resupply Rack (HRR) x 7, Pressurized Section Resupply Rack (PSRR) x 1 |
| Unpressurized Logistics Carrier (ULC) |
SMILES (Japanese experiment) HREP (NASA’s experiment) |
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