ACE is modular and scalable

ACE can handle a wide range of missions. From the smallest earth observation satellites with 200W of available power, up to large communication satellites with multiple kilowatts of power. ACE systems can be configured with multiple thrusters and PPUs.

High thrust and high efficiency in the same system

An ideal propulsion system would have high thrust for missions like orbit raising, phasing, or plane changes, and high specific impulse for years of stationkeeping. This kind of flexibility is now possible in one system with ACE. As an example, a 1000W ACE can be set to provide 120mN of thrust during the orbit raising stage of your mission. Then on command, it can be switched to high efficiency operation with more than 1600 seconds of specific impulse. With this flexibility, ACE provides the best of both worlds.

ACE standard configuration is ideal for 150-500 kg satellites

ACE is a clean-sheet design based on decades of Hall thruster expertise. Free from the constraints of legacy designs, Apollo incorporated the requirements of new large constellations to create an advanced propulsion system using 300W to 500W - ideal for satellites between 150kg and 500kg.

Available in configurations with multiple thrusters for 500-2,000 kg satellites

ACE systems can use between 1 and 6 thrusters and between 1 and 6 PPU’s. This leverages the flight heritage of individual components while scaling to meet demanding mission requirements.

Cross-strapped systems increase reliability

Propulsion is obviously a mission-critical subsystem. Apollo offers ACE configurations with cross-strapped routing between multiple thrusters and PPUs, so any thruster can be driven by any PPU. Reliability of these multiplexed configurations far exceeds that of a comparable one-thruster system.

Modular components

Pepsi can for scale

Case studies

1 thruster and 1 PPU

"I have an earth observation constellation in LEO orbit around 500km. Our satellites will be between 50kg and 100kg and we'll mainly use ACE for stationkeeping."

Input power 300 W
ACE dry mass 3.0 kg
Propellant 1.2 kg
Thrust 16 mN
Isp (system) 1040 s
Total impulse 15 kNs
1 thruster and 1 PPU

"Our earth observation customers are willing to pay much more for 30cm imagery. How can we use ACE to fly in a Very Low Earth Orbit below 300 kilometers?"

Input power 500 W
ACE dry mass 4.1 kg
Propellant 20 kg
Total thrust 33 mN
Isp (system) 1500 s
Total impulse 300 kNs
2 thrusters and 2 PPUs

"We have a LEO constellation of large communication satellites, around 700 kg each. We want to use ACE for orbit spreading, stationkeeping, and de-orbiting."

Input power 1000 W
Dry mass 6.6 kg
Propellant 40 kg
Total thrust 66 mN
Isp (system) 1500 s
Total impulse 600 kNs
3 thrusters and 3 PPUs

"Our satellites are around 350 kg and we'll need to raise our orbit from LEO to MEO. If we use ACE for orbit spreading too, we can fly the whole constellation on one rocket. That's $50 million saved in launch costs."

Input power 1500 W
ACE dry mass 8.8 kg
Propellant 60 kg
Total thrust 99 mN
Isp (system) 1500 s
Total impulse 900 kNs
4 thrusters and 4 PPUs

"I have a constellation of communication satellites (around 250 kg) and I'd like to reduce launch costs and accelerate my schedule. How can I use ACE to boost from LEO to GEO in under 10 weeks?"

Input power 2000 W
ACE dry mass 11.1 kg
Propellant 80 kg
Total thrust 132 mN
Isp (system) 1500 s
Total impulse 1200 kNs
6 thrusters and 6 PPUs

"We have a high mobility mission which requires a fast but efficient orbit raise from LEO to GEO."

Input power 3000 W
ACE dry mass 14.8 kg
Propellant 120 kg
Total thrust 198 mN
Isp (system) 1500 s
Total impulse 1800 kNs

Frequently Asked Questions

"What communication protocol is ACE compatible with?"

CAN Bus is the preferred communication protocol for ACE. Other interfaces may also be possible depending on requirements.

"What is ACE's operating voltage range?"

27-38VDC unregulated input is our standard range. Contact us if you have a bus operating outside this range.

"Can ACE be used to steer the satellite?"

Apollo does not have a gimbal but can work with one if you have one. Multi-thruster configurations can steer by varying the thrust duration among the thrusters.

Let's get started

We're excited to work with you. Please feel free to download the ACE Datasheet, then reach out to us to get started. Typical next steps include:

1 Complete a mutual NDA to download reports from The Aerospace Corporation and Quanta.
2 Trade CAD files with us to explore how ACE fits in your satellite.
3 Explore appropriate configuration options for your mission.
4 Discuss interface, thermal, radiation, qualification, and acceptance test requirements.
5 Discuss launch and delivery schedules, transportation options, and range safety coordination.

What can ACE do for your constellation?

Reach out to us at and let's talk.