Beyond-line-of-sight

In radio frequency (RF) communications, BLOS refers to communications beyond visual distance or beyond-line-of-sight. High-frequency (HF) communications in the 2-30 MHz band provide BLOS communication. Maintaining communications with an autonomous UMS has safety implications loss of communications or incorrect communications is a hazard source. 

The line of sight is the distance beyond which optical flatness ceases to be linear, giving rise to aberation. 

However, this straight line is never produced into the second quadrant beyond the origin, because it is usually assumed that we are dealing with physical systems in which the physical variables K and cannot take negative values. This means that the full power of Eq. (1) is arbitrarily curtailed, so that any possible errors in the fundamental theory that led to its deduction are, as it were, hidden out of sight. In the present case, since dimensionless units are used, this argument of physical units does not apply, so that both E and can take both negative and positive values. 

It is important that Figure 2.15 be accompanied by certain comments. Indeed, the curves taken from [GON 12] seem to suggest that beyond 100°C, the enthalpy for vaporization of the water no longer needs to be supplied. This is only true if the water is injected into the electrolyzer as vapor (in terms of the component, it disappears from the balance in terms of the overall procedure, we must not lose sight of it). If the water is injected in liquid form, as can clearly be seen from the curves taken from [STO 10b], then it needs to be supplied as entropic heat (caution unlike the curve ziHd, the scenario is not traced as a dotted line for the curve representing the TASdrev, which would then be translated as AHvapo (100°C , 1 bar) = 40.65 kJ/mol). Table 2.8 gives a numerical illustration of these arguments at 1000°C and 1 bar. 

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