Issue 71

Commercial: SpaceX Transporter 7 Launch

15 Apr 2023: SpaceX launched from Vandenberg SFB with more than 50 satellites on the latest in a series of dedicated Falcon 9 small-sat rideshare missions. Most of the payloads were deployed starting an hour after liftoff, following a second burn of the upper stage. Those payloads were released over a span of about 20…

15 Apr 2023: SpaceX launched from Vandenberg SFB with more than 50 satellites on the latest in a series of dedicated Falcon 9 small-sat rideshare missions. Most of the payloads were deployed starting an hour after liftoff, following a second burn of the upper stage. Those payloads were released over a span of about 20 minutes. The upper stage then performed two more maneuvers before deploying the final, and largest, payload, the 800-kilogram IMECE imaging satellite built by Turkish research institute Tübitak Uzay 2 hours and 35 minutes after liftoff. Launch Video.

– The launch carried 51 payloads, but SpaceX did not release a full list of the satellites on board. This was the first in SpaceX’s series of Transporter dedicated smallsat rideshare missions to launch from Vandenberg, after the first six launched from Cape Canaveral, Florida.

Fifty of the Transporter 7 payloads were deployed into a sun-synchronous polar orbit roughly 310 miles (500km) in altitude, at an inclination of 97.4° to the equator, followed by two more short firings by the upper stage engine to raise the rocket’s altitude to more than 420 miles (about 680km). The orbit adjustment also slightly changed the inclination to 98.2°, setting up for separation of the largest payload on the Transporter 7 mission – Turkey’s IMECE Earth observation satellite – more than two-and-a-half hours into the mission.

-The 1,543lb (700kg) IMECE satellite is the first high-resolution Earth-imaging satellite to be built entirely by domestic Turkish industry. IMECE was mounted to the top of the multi-satellite adapter structure inside the Falcon 9’s payload fairing for launch.

– Satellogic had four imaging satellites onboard while GHGSat had three satellites for greenhouse gas monitoring. HawkEye 360 launched its seventh cluster of three satellites for radiofrequency (RF) monitoring and Unseenlabs launched its BRO-9 satellite, also for RF monitoring. Umbra launched another synthetic aperture radar imaging satellite.

– This was the first Falcon 9 launch to use a shorter nozzle on the rocket’s upper-stage engine. SpaceX representatives said on the launch webcast that they will use the shorter nozzle to save money on missions that do not require as much performance, but retain the longer nozzle for higher-performance missions.

-SpaceX says that demand for Transporter missions remains high even as the company has increased prices: a 200-kilogram satellite that would have cost $1 million to launch at the beginning of 2022 now costs $1.3 million.

IMECE

Transporter 7 orbits