The phrase "a compact array" is correct and usable in written English.
It can be used when describing a data structure or collection that is organized efficiently in a limited space.
Example: "The algorithm processes the data using a compact array to optimize memory usage."
Alternatives: "a dense array" or "a concise array".
We have thus succeeded in building a compact array detector suitable for a satellite payload.
The infrared image is picked up by a compact array of photovoltaic pixels implanted right where the light-sensing cells would be in a healthy eye.
The exchange grid is designed not as a sparse matrix among all possible pairs of parent grid cells but as a compact array pointing back to the parents.
The displacement sensor is designed with a particular arrangement of a compact array of SPMs with specially designed shutter assembly and signal processing to significantly reduce sensitivity to ambient light, input voltage variation, circuit electronics drift, etc.
The heart of COSI is a compact array of cross-strip germanium detectors (GeDs), providing excellent spectral resolution (~0.2 1%) and the capability to track individual photon interactions with full 3D position resolution to 1.6 mm3.
The four EF hands of the protein are arranged in a compact array that contrasts with the dumbbell shape of calmodulin and troponin C. A calcium ion is bound to EF hand 3, while EF hand 2 can bind samarium but not calcium in this crystal form.
The Atacama Large Millimeter Array (ALMA) is planned to consist of fifty 12-metre (39-foot) dishes operating at wavelengths as short as 0.3 mm (0.01 inch), as well as a more compact array of four 12-metre (40-foot) and sixteen 7-metre (23-foot) dishes.
(https://csiropedia.csiro.au/radio-astronomy-observing-explosions-on-the-sun/) Fig. 6 a Australia Compact Array telescope, Narrabri, NSW.
However, as the authors state, this method does not work when a single compact array is used since there are not enough measurements associated to both sources.
To explore this possibility, researchers used NASA's Chandra X-ray Observatory and CSIRO's Australia Telescope Compact Array, a radio telescope.
The JRC-ESTI used a rotating grating spectroradiometer composed of a single stage monochromator and a Si-PbS sandwich detector in order to cover a wavelength range from 300 to 2500 nm, and, for the natural sunlight measurements, additionally a system composed of three compact array spectroradiometers covering the wavelength range from 300 to 1700 nm.
