# GEO Aries!

Highly-maneuverable, multi-mission platform for proliferated GEO missions.

## Multi-Mission GEO Platform

GEO Aries is a highly-maneuverable, multi-mission platform designed to support high ΔV GEO missions while maximizing payload capacity in an ESPA payload envelope.

From GEO Rendezvous and Proximity Operations to space reconnaissance, GEO Aries is designed for next-gen proliferated operations in the GEO belt.

### Payload Mass

Up to

120

KG

When Launched On A 15" ESPA Port

### Payload OAP

125+

W

Base Power EOL (5 yrs.)

### First Flight

2027

Download the GEO Aries spec sheet

[Download the GEO Aries spec sheet](https://apex.docsend.com/view/y3h6txxiykjpkv2j)

## Notional Missions

Next-generation GEO operations require highly maneuverable platforms built at scale. GEO Aries is enabling the future of GEO spaceflight with agile performance and a production-first design built for resilient, proliferated architectures.

### Proliferated GEO

GEO Aries is designed for serial production, enabling resilient proliferated architectures by replacing bespoke buses with scalable platforms.

### GEO RPO Missions

GEO Aries is optimized for agility with 800 m/s of available ΔV, 6DOF Hydrazine propulsion, and support for third-party RPO kits.

### Space Reconnaissance

Execute mission-critical space reconnaissance operations with persistent monitoring and responsive operations in geostationary orbit.

## Configuration Package

### GEO Aries Platform

### 1.0 Mission Parameters

| Design Life | 5 Years (GEO direct inject) |
| ----------- | ---------------------------- |
| Nominal Orbit | Circularized GEO |
| Propulsion Options | Chemical Propulsion (up to 800 m/s)<br>_ΔV performance payload mass dependent_ |
| Compatible Launch Vehicles | SpaceX F9 (Rideshare or Dedicated) | ESPAStar | Others |

### 2.0 Mechanical Configuration

| Stowed Payload Volume | ESPA 15" Compatible:<br>1350 × 500 × 600 mm (L x W x H) |
| --------------------- | ------------------------------ |
| Bus Dry Mass | 175 kg |
| Payload Mass | Up to 120 kg |

### 3.0 GNC Performance

| Pointing Knowledge | <10 arcsec @ 3σ |
| Pointing Control | <20 arcsec @ 3σ |
| Maximum Slew Rate | Up to 1 deg/sec |
| Precision GNC Package | Option: Payload Boresight Mounted Star Tracker (Apex-Furnished)<br> Pointing Knowledge: 6 arcsec @ 3σ |

### 4.0 Power & Data

| Payload Orbit Average Power (EOL) | Base Model: 125 W<br> High Power Configuration: 500 W OAP |
| ------------------- | -------------------- |
| Payload Peak Power | 500 W (Sustained)<br>750 W (Instantaneous) |
| Bus Voltage | 28 V Unregulated |
| Encryption Options | AES 256 | NSA Type 1 |
| Payload Power Services | Power Lines | Temperature Sensors | Heaters |
| Payload Data Services | Gigabit Ethernet | RS-422 | PPS | Discretes | 10 MHz Clock Signal | Analog |
| Communications | **TT&C**<br> S-Band Uplink (USB compatible): 5 kbps<br> S-Band Downlink (USB compatible): 25 kbps<br>**[Optional] Mission Data Link**<br> X-Band Downlink: 2.5 Mbps<br> Ka-Band Downlink: 4 Mbps |

# Configure & order your Apex Bus

Select a bus model to start configuring

### Payload Capacity

120 KG

### Payload OAP

125+ W