(4" diameter) 2 early ARIA Apollo telemetray patches. One patch has a deep blue background, the other a silver grey. Richly embroidered in excellent condition. In the 1960's, NASA realized that the lunar missions of the Apollo program would require a worldwide network of tracking and telemetry stations positioned in remote regions of the world. Since land stations are limited by geographical constraints, and instrumentation ships cannot be moved quickly enough to cover different positions during the same mission, large gaps in coverage would occur. A new concept in tracking stations was developed, a high-speed aircraft containing the necessary instrumentation to assure spacecraft acquisition, tracking and telemetry data recording. The aircraft provide coverage of translunar injection and recovery for NASA's manned space flight operations, and DoD orbital or ballistic missile reentry tests. NASA and DoD jointly funded the modification of eight C-135 jet transport/cargo aircraft. The Apollo/Range Instrumentation Aircraft (A/RIA), designated EC-135N, became operational in January 1968, modified at the basic cost of $4.5 million per aircraft. Rare early patches.