Instantaneous Field of View (IFOV) or Spatial Resolution is the smallest detail within the FOV that can be detected or seen at a set distance, and Instantaneous Field of View Measurement (IFOV Measurement) establishes the smallest measurable area from which an accurate temperature measurement from set distance can be obtained [29].

The FOV for each detector is defined by the size and position of the detector field stop. The combined 3 × 3 FOVs define the field of regard (FOR). Fig. 4 shows ground footprints of the nine FOVs forming the nadir FOR viewed from the spacecraft (S/C) moving in the indicated direction. The FOV with index 5, FOV 5, is called the center FOV.

2022年11月1日 · The GSD is the most common Detector metric, it assumes α = IFOV = p/f, where IFOV stands for Instantaneous Field Of View (Fiete 1999). A variation of this metric replaces the physical pixel pitch p along scan direction with an equivalent pitch p eff ( Cota et al 2010 ) to consider over-sampling or under-sampling ( Fiete and Tantalo 1999 ).

2024年3月30日 · When it comes to satellite remote sensing, the instantaneous FOV (IFOV) angular resolution is limited to a value determined by the diffraction limit, which is λ/D, where λ is the wavelength, and D is the diameter of the first target (lens or in the case of most satellite instruments the primary sensor mirror).

2022年8月1日 · To achieve the required FOV and SNR places a number of practical constraints on the sensor—particularly as it relates to f-number (F/#) and image exposure time. This can be done by solving Eq. (32) for exposure time, rather than SNR. We can overlay contours of exposure time on the FOV vs. star brightness cutoff trade space, resulting in Fig. 17.

Its width was about 300-400 km. On the microwave image, a width of bright band where T B (θ) > 250-260 K was approximately 150-160 km (about 10 FOV). It had a high contrast against the background where T B (θ) ≈ 170-190 K and crossed the image at about 42-43°N (Figure 6 b). Sharpness of its boundaries was, likely, determined solely by a ...

The MHS is a self-calibrating microwave radiometer, observing the Earth with an FOV of ±50° from nadir in five frequency channels of the millimeter-wave band (90–190 GHz). Together with AMSU-A the MHS provides the operational microwave atmospheric sounding capability for NOAA 18, 19 satellites as well as the European MetOp satellites.

2024年2月1日 · The beams for each field angle can converge within one pixel with an energy ratio of more than 98%, illustrating the good energy collection effect of the receiving system. The IFOV of the system’s full FOV is shown in Fig. 7. The figure shows that the IFOV of the central FOV is the smallest and has a value of 0.07°.

2012年1月1日 · The target aircraft is in the centre of the overall FOV and as the IFOV passes over the centre point, IR energy between 3 and 5 μm strikes the InSb detector and produces a voltage (detector output). As each of these detections is of a valid target they produce enough energy to exceed the threshold programmed into the SP and tracking is ...

2020年10月1日 · Because of the small diffraction angle, the FOV of the generated optical image is just FOV1 (~1°) in Fig. 1. The current observing lens in the optical image generation has the FOV capability of 20° over, including FOV1 + FOV2 + FOV3 in Fig. 1. Therefore, the FOV of the image generator does not match with the observing lens.