How to generate point-in-time sky-vectors for sun-coefficient step in five-phase method

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The annual sky-matrix for the sun disk can be generated using (e.g., from here):

gendaymtx -m 6 -5 0.533 -of assets/NYC.wea > skyVectors/NYCd6.smx

However, if I only want to generate the sky-vector for a certain point in time, what should I use?

I tried:

gensky 3 20 10:30EDT -m 75 -o 73.96 -a 40.78 | genskyvec -m 6 -5 0.533 > NYC_CIE_sun.vec

but got an error:

Unexpected command-line argument: 0.533

Can I simply do

gensky 3 20 10:30EDT -m 75 -o 73.96 -a 40.78 | genskyvec -m 6 -d > NYC_CIE_sun.vec

? In this case, will the absence of the sun disk size '-0.533' information post any problem?