A constraint, in project management, is any restriction that defines a project's limitations; the scope, for example, is the limit of what the project is expected to accomplish. ... For example, increasing the scope of the project is likely to require more time and money.
One main challange of this sencer is their relatively low Dc offset voltage,with raw signal amplitude below 0.5mV.Additional noise originates internaly from device but also by the environment. As a result,initial experiment with a plain analog to digital conversion failed due to low voltage level.
The current limitations for image-based monitering sensing applications are mainly due to sensor attributes, such as restricted spectral range, coarse spatial resolution, slow turnaround time, and inadequate repeat coverage. According to experts in PCM, the potential market for remote sensing products in PCM is good.