W4
Mission Overview
November 2025
Return Details
Return Complex
Koonibba Test Range
Koonibba, South Australia
Return Date
No earlier than
November 22, 2025
Return Timing
During night time hours
Return Vehicle
W-4 Capsule
Customer
Varda Space Industries
W4 - Back for more
The W-4 mission is a joint venture between Varda Space Industries and Southern Launch, and a significant next step in the W-series.
This mission features two major technology demonstrations. Including the first flight of Varda’s in-house satellite bus, providing power, communications, attitude control, and propulsion. As well as a C-PICA heat shield manufactured in-house by Varda, which was developed as part of a NASA Tipping Point award and technology transfer licensing agreement.
Image: (Varda Space Industries) A first look at Varda’s bus
Mission Summary
W-4 launched on June 23, 2025 on SpaceX’s Transporter 14 rideshare from Vandenberg Space Force Base in California.
W-4 marks a pivotal next step for Varda as they test their first satellite bus, designed and built in-house. This mission will also feature a new heatshield produced entirely in Varda’s factory (see right).
W-4 will be returning to the Koonibba Test Range, operated by Southern Launch and the Koonibba Community Aboriginal Corporation, as part of the series authorisation granted under the Space (Launches and Returns) Act 2018 (Cth).
The Koonibba Test Range offers more than 41,000 square kilometres of uninhabited land to accept the re-entry of in-space manufacturing capsules. This open space combined with low air traffic is essential for low-earth orbit to be the home for in-space manufacturing and become humanity’s next evolution of industrial capacity.
Image (Varda Space Industries): A look at Varda’s new, in-house produced heat shield.
Community Information
Koonibba Test Range
The Koonibba Test Range (KTR) is located 40km north-west of Ceduna on the West Coast of the Eyre Peninsula, South Australia.
Public Viewing
The capsule will be re-entering the atmosphere at high speed in the early-morning. No public viewing areas will be available.
Members of the public are not permitted to enter the Koonibba Test Range at any point during return operations.
Hazard Area Controls
AIRSPACE RESTRICTIONS
Notice to Airmen (NOTAM) will be published providing details of airspace restrictions on the National Aeronautical Information Processing System (NAIPS) one week prior to the return.
A Temporary Restricted Area and Temporary Danger Area will be established on the target return date for a window of approximately 50 minutes. Final enforcement timings will be promulgated through the NOTAM.
As a matter of safety, aircraft are requested to remain outside the declared airspace for the duration of the NOTAM.
Airservices Australia will serve as the Controlling Authority for the Temporary Restricted Area and the contact for the Temporary Danger Area on the day of the return.
Safety broadcasts will be made over the Ceduna Common Traffic Advisory Frequency (CTAF) in the immediate leadup to the return.
Figure 1 - (Above) Coordinates of the Temporary Restricted Area (red) and Temporary Danger Area (blue) airspace restrictions for the W-4 return.
Figure 3 - (Above) Close up view of the airspace restrictions for the W-4 return.
Figure 2 - (Above) Overview of the Temporary Restricted Area airspace restrictions for the W-4 return.
The SA Department for Environment and Water will implement park closures for areas of the Yellabinna Wilderness Area, Yellabinna Regional Reserve, and Yumbarra Conservation Park west of Googs Track (which will remain open).
Users of the parks are requested to refer to the National Parks and Wildlife Service’s website for the latest information on park access restrictions.
Landowners in the vicinity of the Koonibba Test Range and persons travelling on the A1 Highway between Ceduna and Penong are advised to remain alert that minor pieces of debris from W-4 may return to land in these areas.
Please contact Southern Launch if you think you may have found debris related to the return which poses a traffic risk or other hazard.
GROUND HAZARD AREAS
A Maritime Hazard Area will be established in the waters south of Ceduna on the target return date, for a window of approximately three hours during the scheduled return time.
As a matter of safety, vessels are requested to remain outside the Maritime Hazard Area for the notified period. Final timings will be promulgated as an AUSCOAST Warning by the Australian Maritime Safety Authority approximately one week prior to the return.
Securite Calls will be also made on VHF Radio Channel 16 and 27 MHz Radio Channel 88 across the Volunteer Marine Rescue Coastal Radio Network notifying of each activation period in the immediate leadup to the return.
The Australian Hydrographic Office will promulgate a separate advisory Notice to Mariners over a larger activity area and for a longer duration, informing vessels of the risk of impacting and floating debris.
Vessels may elect to operate freely within the broader Notice to Mariners area while remaining vigilant of hazards; however, vessels are requested to remain outside of the Maritime Hazard Area during period(s) of activation.
MARITIME RESTRICTIONS
Figure 5 - (Above) Coordinates for the Maritime Hazard Area.
Figure 6 - (Above) Coordinates for the Notice to Mariners.
Figure 4 - (Above) Vessels may elect to operate within the Notice to Mariners (Black) promulgated the AHO but will be directed to remain outside of the Maritime Hazard Area (Red) during the re-entry.
Contact
PRIOR TO RETURN DATE
For any enquiries regarding the W-4 mission ahead of the return date.
Please email media@southernlaunch.space
ON RETURN DATE
Airspace: Airservices Australia will serve as the Controlling Authority on the day of the return.
Maritime: Southern Launch Area Controller +61 499 505 211
General enquiries & media: Southern Launch +61 477 560 298