What does ZTD stand for?
ZTD stands for "Zenith Total Delay"
How to abbreviate "Zenith Total Delay"?
"Zenith Total Delay" can be abbreviated as ZTD
What is the meaning of ZTD abbreviation?
The meaning of ZTD abbreviation is "Zenith Total Delay"
What does ZTD mean?
ZTD as abbreviation means "Zenith Total Delay"
