Network Modernization: TROPO


The Army’s next generation Tropospheric Scatter Transmission (Tropo) capability will provide expeditionary beyond-line-of-sight capability that will extend network range and significantly increase throughput, while greatly reduce size, weight and power (SWaP) requirements, compared to the current Tropo capability that it will replace. This versatile commercial-off-the-shelf system can operate in satellite denied environments, and will increase multipath diversity in congested and contested environments against near peer adversaries. One of the biggest advantages of the next generation Tropo is its lower latency compared to satellite capability, improving the performance of the network, especially for real-time applications.

The Army’s next generation Tropo system uses tropospheric scattering capability, which bounces signals off of the Earth’s atmosphere to provide high-capacity beyond-line-of-sight capability without using expensive and limited satellite resources. It also uses particles in the atmosphere as reflectors for microwave radio signals. Tropo reduces the Army’s over-reliance on satellites, while saving significant costs by reducing expensive commercial satellite airtime leases. When fielded, the Army’s next generation Tropo will augment and expand the transport capacity of the Army’s tactical network.

When fielded, Tropo will be a key component of the Army’s Expeditionary Signal Battalion-Enhanced network tool suite, which modernizes the Army’s current ESBs.

Tropo is fully interoperable with the Army’s Tactical Network and architecture, and it provides assured high-capacity range-extending network transport in network congested and contested environments against near-peer adversaries. It also supports Command Post mobility and survivability, by providing an easy to deploy, quick set up/tear down communications solution to enable units to relocate rapidly, while delivering resilient network connectivity to ensure the exchange of critical real-time battlefield situational awareness to help keep forces safe from enemy fire and ensure mission success.


  • Beyond-line-of-sight without satellites; diffracts over mountains
  • Operates in satellite denied environments, increases multipath diversity, and adds redundancy and operational flexibility to the tactical network
  • Significant increase in bandwidth and range versus current Tropo capability
  • Significant size, weight and power (SWaP) reduction over current capability for improved unit agility
  • Rapid set up by two Soldiers
  • Reduces the Army’s reliance on satellites; saves significant costs by reducing the use of expensive commercial satellite airtime leases