Why runway 13L/31R of JFK Airport does not mention any Threshold Crossing Glide Path Height for its reciprocal end?
That information is shown on the approach plates



It appears that 31R is not equipped with a VGSI. At least not that I can find. That would be why the data is missing.



On 13L the GS and VGSI are both 3°, but since the VGSI is located about 300ft further down the runway than the GS antenna the TCH is higher.