[CESG] My vote for the Magenta Book Delta Dor Architecture ( 506.2-M-0) with the figure

[Issler Jean-Luc]

Dear all,

I hope that you have a good summer so far!

I just voted (with conditions) for the Magenta Book Delta Dor Architecture  (506.2-M-0), by trying to add a figure, which worked during the edit, but the figure was lost after I pressed the save key.

So please find here below the conditions with the figure

See you soon; VBR

Jean-Luc


Minor conditions:

Small imperfection on Figure  2-1: Delta-DOR Observation Geometry. The spacegraph delay tau is the "Spacecraft to Station" propagation time difference for the farthest station (t2) minus for the nearest station (t1). But this is not what is represented on the Figure for tau, because the ray paths are actually parallel for both ground stations, while they are not on the figure 2-1. In other word, we should have t2 = t1+ tau  on the figure, but we have not. But it is not possible to represent spacecraft and quasar, and related parallel ray paths. That is why I suggest to complete the sentence "the observation geometry is illustrated in Figure 2-1" like this for instance: "the observation geometry is illustrated in Figure 2-1 assuming the 2 ray paths from the spacecraft (and from the quasar) are actually parallel".

I draw the figure below (with a true representation of tau) to illustrate the point
[cid:image001.png at 01DD3181.CBAC45B0]
[cid:image003.png at 01DD3182.41333F50]
2) On figure 4-1, the formula related to the fractional delay correction (bottom right of the figure) looks to have a parenthesis error. There are 3 opening parenthesis, and 4 closing parenthesis. An additional opening parenthesis may be placed just after the term f (frequency) following the "=" (equal) sign, or the parenthesis just before the "-" (minus) sign may be removed.

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