# AWS Ground Station Site Capabilities
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 To simplify your experience, AWS Ground Station determines a common set of capabilities for an antenna type and then deploys multiple antenna to a ground station location. Part of the onboarding steps ensures your satellite is compatible with the antenna types at a specific location. When you reserve a contact, you indirectly determine the antenna type used. This ensures your experience at a particular ground station location remains the same over time regardless of which antennas are being used. The specific performance of your contact will vary due to a wide variety of environmental concerns such as weather at the site. 

Currently, all sites support the following capabilities:

**Note**  
 Each row in the following table indicates an independent communication path, unless otherwise indicated. Duplicate rows exist to reflect our multi-channel capabilities that allow multiple communication paths to be used concurrently. 


| Capability Type | Frequency Range | Bandwidth Range | Polarization | Common Name | Notes | 
| --- |--- |--- |--- |--- |--- |
| antenna-downlink | 7750 - 8500 MHz | 50 - 400 MHz | RHCP | X-band wideband downlink |  This capability requires the use of the [AWS Ground Station Agent](https://docs.aws.amazon.com/ground-station/latest/gs-agent-ug). <br /> This capability is not supported in Alaska 1 or Punta Arenas 1. <br /> The aggregate bandwidth must not exceed 400MHz per polarization at each location. <br /> All utilized frequency ranges must be non-overlapping.  | 
| antenna-downlink | 7750 - 8500 MHz | 50 - 400 MHz | RHCP | 
| antenna-downlink | 7750 - 8500 MHz | 50 - 400 MHz | RHCP | 
| antenna-downlink | 7750 - 8500 MHz | 50 - 400 MHz | RHCP | 
| antenna-downlink | 7750 - 8500 MHz | 50 - 400 MHz | RHCP | 
| antenna-downlink | 7750 - 8500 MHz | 50 - 400 MHz | LHCP | 
| antenna-downlink | 7750 - 8500 MHz | 50 - 400 MHz | LHCP | 
| antenna-downlink | 7750 - 8500 MHz | 50 - 400 MHz | LHCP | 
| antenna-downlink | 7750 - 8500 MHz | 50 - 400 MHz | LHCP | 
| antenna-downlink | 7750 - 8500 MHz | 50 - 400 MHz | LHCP | 
| antenna-downlink | 2200 - 2290 MHz | Up to 40 MHz | RHCP | S-band downlink | Only one polarization can be used at a time | 
| antenna-downlink | 2200 - 2290 MHz | Up to 40 MHz | LHCP | 
| antenna-downlink | 7750 - 8500 MHz | Up to 40 MHz | RHCP | X-band narrowband downlink | Only one polarization can be used at a time | 
| antenna-downlink | 7750 - 8500 MHz | Up to 40 MHz | LHCP | 
| antenna-uplink | 2025 - 2110 MHz | Up to 40 MHz | RHCP | S-band uplink | Only one polarization can be used at a time<br />EIRP 20-50 dBW | 
| antenna-uplink | 2025 - 2110 MHz | Up to 40 MHz | LHCP | 
| antenna-uplink-echo | 2025 - 2110 MHz | 2 MHz | RHCP | Uplink echo | Matches antenna-uplink restrictions | 
| antenna-uplink-echo | 2025 - 2110 MHz | 2 MHz | LHCP | 
| antenna-downlink-demod-decode | 7750 - 8500 MHz | Up to 500 MHz | RHCP | X-band demodulated and decoded downlink |  | 
| antenna-downlink-demod-decode | 7750 - 8500 MHz | Up to 500 MHz | LHCP |  | 
| tracking | N/A | N/A | N/A | N/A | Support for auto-tracking and program tracking | 

\* RHCP = right-handed circular polarization, and LHCP = left-handed circular polarization. For more information on polarization, see [Circular polarization](https://en.wikipedia.org/wiki/Circular_polarization).