access json fields after $.getJSON

Question

I am using following js script which loads custom geojson file depending on time parameter passed(date format):

_getDataForTime: function(time) {
    if (!this._map) {
        return;
    }
    var jsd ={}
    var d = new Date(time);
    url0="https://raw.githubusercontent.com/tekija/LCd/master/"
    var url = url0+ d.format("yyyy-mm-dd'T'HH", true) + '.geojson';
    var callback = function(status, data) {        
        console.log(status);
        jsd=data;
        console.log(data);
        // data
        if (status == 'ok'){
            
            this._currentTimeData = data;

        } else{
            this._currentTimeData = [];
        }
        this._currentLoadedTime = time;
        if (this._timeDimension && time == this._timeDimension.getCurrentTime() && !this._timeDimension.isLoading()) {
            this._update();
        }
        this.fire('timeload', {
            time: time
        });
    };
    
    $.getJSON(url, callback.bind(this, 'ok')).fail(callback.bind(this, 'error'));

}

Here is example of geojson file used - can be used instead of url variable.

I can log data to console with console.log(data), but I cant access individual fields in JSON i.e. t2m and coordinates.

How can I do this? I tried referencing with data.features.t2m but no success.