A satellite ground station is the collection of Earth-based antennas and operations infrastructure that transmits commands to spacecraft and downlinks mission data.
Instead of spending capital to construct dedicated facilities, operators can secure antenna passes through a managed service such as AWS Ground Station or government networks.
A satellite ground station is the antennas and operating center that command a satellite and receive its data. See LEO satellites explained and satellite constellations explained. AWS says that traditionally, building satellite ground stations and an operating center required significant capital investment. Operators can instead rent antenna time by the minute through AWS Ground Station or use a government network like the NASA Near Space Network.
AWS Ground Station provides fully managed infrastructure where operators schedule antenna time per minute and pay only for the time used. Government missions use networks such as the NASA Near Space Network, which is made up of Earth-based ground stations and space relays. For the spacecraft side of the link, see how satellites work and how satellite tracking works.
How a Satellite Ground Station Contact Works
Communications between a satellite and a ground station take place during scheduled windows known as contacts. A contact is a specific reservation to communicate with an identified satellite from a designated ground station location between agreed start and end times.
For instance, AWS Ground Station offers two distinct scheduling tiers: On-Demand contacts and Reserved contacts. On-Demand contacts can be scheduled anywhere from 15 minutes to 7 days in advance of the pass. If an operator requests a time slot that cannot be reserved, the console shows available alternatives. On-Demand reservations can be cancelled up to 15 minutes before the pass begins, though doing so incurs a cancellation fee equal to the price of the contact.
During a contact on AWS Ground Station, data can be delivered to an Amazon EC2 instance for real-time processing or to an Amazon S3 bucket for later processing.
AWS’s pricing glossary defines “narrow band” as any pass with instantaneous bandwidth under 40 MHz. A wideband contact is defined as a pass using 40 MHz or more of instantaneous bandwidth.
Buy Versus Rent Decisions for Ground Infrastructure
Deciding whether to build a ground station or rent antenna time comes down to capital investment versus paying per minute for antenna time. AWS states that traditionally, significant capital investment was needed to build satellite ground stations and the operating center. With AWS Ground Station, AWS manages the infrastructure and customers pay only for the antenna time used.
AWS states that customers can save up to 80% on ground station operations by paying only for antenna time used. However, this is an AWS marketing claim, and the empirical basis for that percentage figure is not published on AWS’s pages.
On-Demand contacts on AWS Ground Station carry no long-term financial commitment. Reserved pricing gives a discounted rate and improved scheduling in exchange for a monthly commitment. AWS Ground Station offers reserved-minute pricing for customers who commit to monthly usage across a 12-month period.
The specific per-minute rates for both on-demand and reserved antenna time are presented in an interactive table on the AWS Ground Station pricing page. The total cost to construct a dedicated ground station is not published by AWS.
Terrestrial Antenna Locations and Network Distribution
AWS maintains antenna resources across multiple international locations: Alaska 1, Bahrain 1, Cape Town 1, Dubbo 1 in Australia, Hawaii 1, Ireland 1, Ohio 1, Oregon 1, Punta Arenas 1 in Chile, Singapore 1, and Stockholm 1. The operational footprint can change over time; as of June 16, 2026, AWS no longer supports antenna resources in Seoul. AWS says the ListGroundStation and ListAntennas APIs return the stations and antennas available.
The antenna sites in Alaska, Dubbo, Hawaii, and Punta Arenas are not physically located in an AWS Region. Alaska and Hawaii connect to the Oregon Region, Dubbo to Sydney, and Punta Arenas to Sao Paulo. AWS also describes Cross Region Data Delivery, which allows an operator to coordinate multiple simultaneous contacts from a single AWS Region without incurring extra fees for inter-region data transfer.
Beyond the listed stations, AWS offers Dedicated Antennas, which are custom-built antenna systems that AWS manages for a customer. The technical capabilities and physical locations of these dedicated systems are not publicly disclosed.
Regulatory Approvals and Ground Licensing Lead Times
With AWS Ground Station the customer still completes the ITU and FCC filings and holds the satellite license.
According to AWS, customers do not need to acquire their own ground station license or spectrum license to use AWS antennas. The customer must complete appropriate ITU and FCC filings and hold the underlying satellite license. Once the customer has secured those spacecraft permissions, AWS obtains the necessary ground station operating licenses for its facilities. Customers begin the process by completing an Onboarding Questionnaire, after which AWS calculates a cost estimate for each antenna location before submitting regulatory filings.
AWS lists licensing lead times by country. These administrative timeframes are non-binding estimates subject to change:
- Ireland: 45 days
- Chile: 3 to 6 months
- South Africa: 3 to 6 months
- United States: 3 or more months
- Sweden: 3 or more months
- Bahrain: 6 or more months
- Singapore: 6 or more months
- Australia: 9 or more months
Institutional and Government Networks: The NASA Near Space Network
A government counterpart is the NASA Near Space Network, overseen by the Space Communications and Navigation (SCaN) Program out of Goddard Space Flight Center.
The Near Space Network supplies communications and navigation services to missions operating within 1.25 million miles of Earth. Its operational structure combines terrestrial ground stations with space relay platforms. The terrestrial component consists of more than 40 government-owned and commercially-owned antennas placed around the globe. By incorporating commercial partnerships, NASA can focus its resources on developing innovative communications and navigation technologies rather than exclusively building, maintaining, and operating physical network infrastructure.
To supplement direct Earth-based ground stations, the Near Space Network operates a fleet of space relays in geosynchronous orbit known as the Tracking and Data Relay Satellites (TDRS). The TDRS satellites give missions near-constant contact. The Near Space Network supports a wide array of activities, including human spaceflight, science, technology demonstrations, and rocket launches.
What to Verify Before Choosing a Ground Station Solution
Before selecting a ground station solution, operators can evaluate these operational factors based on published specifications:
- Frequency and Orbit Compatibility. For example, AWS Ground Station supports missions operating in low Earth orbit, medium Earth orbit, and non-geostationary Earth orbits. Supported frequencies include S-band transmit from 2025 to 2120 MHz, S-band receive from 2200 to 2300 MHz, and X-band receive from 7750 to 8400 MHz.
- Regulatory Approval Lead Times. AWS publishes country-specific timelines on the AWS Ground Station FAQ.
- Network Distribution and Data Ingestion. AWS antenna sites in Alaska, Dubbo, Hawaii, and Punta Arenas are not physically located in an AWS Region, and Cross Region Data Delivery lets a customer run multiple simultaneous contacts from a single AWS Region without an extra charge for inter-region data transfer.
- Simulation and Pre-Launch Testing. AWS offers a digital twin feature that lets operators schedule test contacts against virtualized ground station infrastructure. These digital twin stations are exact copies of production sites carrying a “Digital Twin” name prefix. AWS recommends that new customers start integration testing with this digital twin system.
- Commercial Commitment Structures. AWS offers On-Demand and Reserved structures. See the AWS Ground Station pricing page and AWS Ground Station FAQ for the 12-month reservation and cancellation terms.