S4 Crossover is a technology demonstration mission by NearSpace Launch to test a prototype host platform for use in supporting future payloads. While the payload will not be separated from the rocket, this mission will provide “flight heritage”.

Features that are to be tested for use in supporting future payloads include a Globalstar transmitter and an Iridium transceiver, as well space environmental instruments to characterize the radiation and plasma densities to which the payloads will be exposed.

S4 CROSSOVER is self-powered and operates independently of the larger Astra launch vehicle second stage to which it is permanently attached.

S4 CROSSOVER contains the following systems:

• Navigation and Attitude Subsystem
• Command and Data Handling (CDH) Subsystem
• Communications System
• Electrical Power Subsystem (EPS)
• Thermal Monitoring Subsystem (TMS)
• Structure Subsystem
• Payload Subsystem
  

The payload is a single unit permanently attached to the launch vehicle.

OreSat0

If all goes to plan, the OreSat0 will become one of the first satellites ever deployed by an Astra launch vehicle.

OreSat0 is a 1U CubeSat that is intended to be a pathfinder for an upcoming 2U CubeSat to launch on a future NASA CubeSat Launch Initiative flight.

The future OreSat 2U spacecraft’s objectives are climate science and STEM outreach.

Meet Rocket 3, Astra's entry to the dedicated, small satellite launch market.

Capable of lifting 500-630 kg to low Earth orbit and taking up to 335 kg to sun-synchronous orbit, Rocket 3 is made up of two stages.

The first stage uses 5 Delphin engines while the second stage uses a single Aether engine. Both stages use RP-1 kerosene and liquid oxygen.

The entire rocket is designed for rapid deployment and only needs about 1 week of launch site preparation. Rocket 3 can be launched from any location and does not require a preexisting spaceport or launch range.

The entire rocket and all of its ground systems are delivered in shipping containers to the launch location making it especially versatile and able to launch in Alaska or Florida.

Through Astra’s Rocket 3 lineage, there have been 4 variations starting with Rocket 3.0.

The first Rocket 3, "1 of 3" or "Rocket 3.0", was to be launched in late February and early March of 2020 as part of the DARPA Launch challenge. On March 23rd, 2020 Rocket 3.0 was destroyed by fire during launch preparations while Astra was detanking fuel during a pre-launch countdown dress rehearsal. No payloads were on-board at the time of the incident.

A second launch attempt took place on September 12th, 2020 using the second Rocket 3 vehicle, Rocket 3.1. The launch failed during first stage flight, when Rocket 3.1 experienced an anomaly and fell back to Earth shortly after, and exploded on impact.

On December 15th, 2020, Astra launched its third Rocket 3 vehicle, Rocket 3.2. The rocket successfully passed the Kármán Line and reached its target orbital altitude of 390 kilometers, a first for Astra. However, due to issues with the upper stage's fuel mixture, the rocket failed to achieve orbit.

On August 28th, 2021, Astra launched its fourth Rocket 3 vehicle, Rocket 3.3 (serial number LV0006). The flight carried an instrumentation payload for the United States Space Force under the Space Test Program. Shortly after liftoff, a single engine failure caused the vehicle to drift horizontally off the launch pad before ascending vertically. The vehicle deviated from its licensed trajectory and range safety terminated the flight at approximately T+02:28. The rocket reached a peak altitude of 50 km (31 mi) before crashing into the ocean downrange of the launch site.

On November 20th, 2021 Astra's Rocket 3.3 vehicle (serial number LV0007) successfully reached orbit after launching from Pacific Spaceport Complex – Alaska carrying the demonstration payload STP-27AD2 (COSPAR 2021-108A, SATCAT 49494) for the United States Space Force.

On February 10th 2022, Astra Rocket 3.3 (serial number LV0008) experienced an anomaly post-launch, during stage separation. After two previous scrubbed launch attempts, ignition and launch of LV0008 occurred nominally. First stage separation failed, and second-stage ignition occurred erratically. The anomaly caused the second stage to spin out of control, and the payload was lost.

Astra is currently developing an upgraded variant of Rocket 3 called Rocket 4. This upgraded design contains new higher performance first stage engines and a payload capacity of several hundred kilograms to low Earth orbit. The first Rocket 4 launch is expected in 2022.

In September 2020, Astra submitted a proposal to the Air Force's AFWERX program titled, "Responsive Launch Enabled by Astra's Rocket 5.0". Rocket 5 will be a variant of the Rocket 3 dedicated to suborbital point-to-point delivery, featuring a modified second stage between the Rocket 3's first and upper stages.

Image: John Kraus for Astra

The Pacific Spaceport Complex is located on scenic Kodiak Island, Alaska.

Formerly the Kodiak Launch Complex, the spaceport is a multi-user facility, allowing military and commercial suborbital and orbital launches from a variety of rockets and companies.

It is owned and operated by Alaska Aerospace Corporation of the State of Alaska.

The spaceport began operations in 1998 and has supported over two dozen launches.

The site has three operational launch pads with an accompanying mission control center.

Launch Pad 1 and Launch Pad 3 are used for orbital launches while Launch Pad 2 is used for suborbital flights.

Image: Rocket 3.1 launches in September 2020. Credit: Astra (John Kraus)