def make_timesteps(start_time, offset, timelist):
    """ Convert list of floats representing time into epoch time
        start_time -- a timezone naive datetime object
        offset -- offset in minutes 
        timelist -- a list of incrementing floats representing time increments  
    """
    timesteps = []
    epoch_ts = convert_ISO_to_epoch(str(start_time), '%Y-%m-%d %H:%M:%S')
    local_timestamp = epoch_ts - offset*60
    for time_item in timelist:
        new_time = int(local_timestamp) + int(time_item * 60) 
        timesteps.append(new_time)
    return timesteps