The large sphere surrounding NBS-1 is not portable, and cannot be moved to the NCNR hall. So, the calibration will take place in NIST's second, smaller, sphere, which is about half the size of the ...

Table 1. Admesy integrating spheres and applications Figure 2 shows three steps of LED measurement procedures, beginning with the sphere setup calibration procedure based on CIE 127 (left column) ...

Statistical parameters relevant to NIST standard particles. Image credit: Beckman Coulter The distribution of pulse heights generated by the microspheres at the time of each calibration sphere ...

On February 4, 1995, astronauts aboard the space shuttle Discovery launched an itty bitty satellite called an Orbital Debris Calibration Sphere into orbit around the Earth. The satellite measured ...