ATPL: The climb gradient of an aircraft after take-off is 6% in standard atmosphere, no wind, at 0' pressure altitude.Using the following corrections:'± 0.2 % / 1000' field elevation''± 0.1 % / °C from standard temperature' '- 1 % with wing anti-ice''- 0.5% with engine anti-ice'The climb gradient after take-off from an airport situated at 1000', 17°C