TLDR: Use an electric blanket instead. Make sure it is on an AFCI and GFCI breaker or outlet.
I take it you don't pay the electric bill.
Tents just can't hold heat, and so you'll be wasting heat energy at an unbelievable rate. A 1500W heater costs about 20 cents an hour to run. And it isn't that much heat, especially if it's cold enough to be snowy. You will be disappointed.
Fire in a tent is suicide. At least it's possible to choose an electric heater which is safe, though the one you pictured isn't it. Inevitably in the confined space of a tent, a heater will get kicked, covered with fabric. etc. Those cheapie heater-fans are death traps in that situation, because they run very hot internal temperatures - if cloth is draped over them and their flow blocked, they can raise to fire-starting temperatures. They supposedly have safety systems, but these things are notoriously cheap, and usually fail when that safety system fails "safe"... so you're betting your life that it won't fail in the other direction.
They make heaters with a great deal of surface area that run at a much lower temperature. Electric blankets are the first thing that comes to mind. Don't heat the room, heat you. However an electric blanket needs AFCI protection, which is a type of circuit breaker or sometimes receptacle (not to be confused with GFCI/RCD). AFCIs are designed to catch short circuits in electric blankets that start fires. If you want a heater, safer heater choices are oil-filled "radiator" heaters, or chicken coop heaters as observed in another answer.
AFCI is also really good at protecting wiring in the walls (e.g. an unreliable American wiring style called the "backstab"), so most AFCI implementations are at the circuit breaker.
Any mains electric (100-240V) going to a tent needs to be GFCI-protected (Europe: RCD) since you will be mixing electricity and water in close quarters. The European "whole house" 30 milliamp RCDs are inadequate for life safety, and you want another RCD that has a 6-8 milliamp trip. GFCI/RCD can either be at the breaker, at the receptacle, or anywhere in between, including other receptacles.