diff --git a/jupiter/jupiter.go b/jupiter/jupiter.go
index 6851c0e..92533fe 100644
--- a/jupiter/jupiter.go
+++ b/jupiter/jupiter.go
@@ -11,7 +11,7 @@ import (
 var (
 	ERR_JUPITER_NEVER_RISE = errors.New("ERROR:极夜，木星今日永远在地平线下！")
 	ERR_JUPITER_NEVER_SET  = errors.New("ERROR:极昼，木星今日永远在地平线上！")
-	// ERR_JUPITER_NEVER_DOWN deprecated -- use ERR_JUPITER_NEVER_SET instead
+	// ERR_JUPITER_NEVER_DOWN deprecated: -- use ERR_JUPITER_NEVER_SET instead
 	ERR_JUPITER_NEVER_DOWN = ERR_JUPITER_NEVER_SET
 )
 
@@ -129,7 +129,7 @@ func RiseTime(date time.Time, lon, lat, height float64, aero bool) (time.Time, e
 	return basic.JDE2DateByZone(riseJde, date.Location(), true), err
 }
 
-// deprecated -- use SetTime instead
+// deprecated: -- use SetTime instead
 // DownTime 落下时间
 // date，取日期，时区忽略
 // lon，经度，东正西负
diff --git a/mars/mars.go b/mars/mars.go
index e28fc25..f4db8bc 100644
--- a/mars/mars.go
+++ b/mars/mars.go
@@ -11,7 +11,7 @@ import (
 var (
 	ERR_MARS_NEVER_RISE = errors.New("ERROR:极夜，火星今日永远在地平线下！")
 	ERR_MARS_NEVER_SET  = errors.New("ERROR:极昼，火星今日永远在地平线上！")
-	// ERR_MARS_NEVER_DOWN deprecated -- use ERR_MARS_NEVER_SET instead
+	// ERR_MARS_NEVER_DOWN deprecated: -- use ERR_MARS_NEVER_SET instead
 	ERR_MARS_NEVER_DOWN = ERR_MARS_NEVER_SET
 )
 
@@ -129,7 +129,7 @@ func RiseTime(date time.Time, lon, lat, height float64, aero bool) (time.Time, e
 	return basic.JDE2DateByZone(riseJde, date.Location(), true), err
 }
 
-// deprecated -- use SetTime instead
+// deprecated: -- use SetTime instead
 // DownTime 落下时间
 // date，取日期，时区忽略
 // lon，经度，东正西负
diff --git a/mercury/mercury.go b/mercury/mercury.go
index a600c01..4411bb0 100644
--- a/mercury/mercury.go
+++ b/mercury/mercury.go
@@ -11,7 +11,7 @@ import (
 var (
 	ERR_MERCURY_NEVER_RISE = errors.New("ERROR:极夜，水星今日永远在地平线下！")
 	ERR_MERCURY_NEVER_SET  = errors.New("ERROR:极昼，水星今日永远在地平线上！")
-	// ERR_MERCURY_NEVER_DOWN deprecated -- use ERR_MERCURY_NEVER_SET instead
+	// ERR_MERCURY_NEVER_DOWN deprecated: -- use ERR_MERCURY_NEVER_SET instead
 	ERR_MERCURY_NEVER_DOWN = ERR_MERCURY_NEVER_SET
 )
 
@@ -129,7 +129,7 @@ func RiseTime(date time.Time, lon, lat, height float64, aero bool) (time.Time, e
 	return basic.JDE2DateByZone(riseJde, date.Location(), true), err
 }
 
-// deprecated -- use SetTime instead
+// deprecated: -- use SetTime instead
 // DownTime 落下时间
 // date，取日期，时区忽略
 // lon，经度，东正西负
diff --git a/moon/moon.go b/moon/moon.go
index a73766b..41b1514 100644
--- a/moon/moon.go
+++ b/moon/moon.go
@@ -11,7 +11,7 @@ import (
 var (
 	ERR_MOON_NEVER_RISE = errors.New("ERROR:极夜，月亮在今日永远在地平线下！")
 	ERR_MOON_NEVER_SET  = errors.New("ERROR:极昼，月亮在今日永远在地平线上！")
-	// ERR_MOON_NEVER_DOWN deprecated -- use ERR_MOON_NEVER_SET instead
+	// ERR_MOON_NEVER_DOWN deprecated: -- use ERR_MOON_NEVER_SET instead
 	ERR_MOON_NEVER_DOWN = ERR_MOON_NEVER_SET
 	ERR_NOT_TODAY       = errors.New("ERROR:月亮已在（昨日/明日）（升起/降下）")
 )
@@ -171,7 +171,7 @@ func RiseTime(date time.Time, lon, lat, height float64, aero bool) (time.Time, e
 	return basic.JDE2DateByZone(riseJde, date.Location(), true), err
 }
 
-// deprecated -- use SetTime instead
+// deprecated: -- use SetTime instead
 // DownTime 落下时间
 // date，取日期，时区忽略
 // lon，经度，东正西负
diff --git a/neptune/neptune.go b/neptune/neptune.go
index d44a7a7..19d6e82 100644
--- a/neptune/neptune.go
+++ b/neptune/neptune.go
@@ -11,7 +11,7 @@ import (
 var (
 	ERR_NEPTUNE_NEVER_RISE = errors.New("ERROR:极夜，海王星今日永远在地平线下！")
 	ERR_NEPTUNE_NEVER_SET  = errors.New("ERROR:极昼，海王星今日永远在地平线上！")
-	// ERR_NEPTUNE_NEVER_DOWN deprecated -- use ERR_NEPTUNE_NEVER_SET instead
+	// ERR_NEPTUNE_NEVER_DOWN deprecated: -- use ERR_NEPTUNE_NEVER_SET instead
 	ERR_NEPTUNE_NEVER_DOWN = ERR_NEPTUNE_NEVER_SET
 )
 
@@ -129,7 +129,7 @@ func RiseTime(date time.Time, lon, lat, height float64, aero bool) (time.Time, e
 	return basic.JDE2DateByZone(riseJde, date.Location(), true), err
 }
 
-// deprecated -- use SetTime instead
+// deprecated: -- use SetTime instead
 // DownTime 落下时间
 // date，取日期，时区忽略
 // lon，经度，东正西负
diff --git a/saturn/saturn.go b/saturn/saturn.go
index c8c577f..b557563 100644
--- a/saturn/saturn.go
+++ b/saturn/saturn.go
@@ -11,7 +11,7 @@ import (
 var (
 	ERR_SATURN_NEVER_RISE = errors.New("ERROR:极夜，木星今日永远在地平线下！")
 	ERR_SATURN_NEVER_SET  = errors.New("ERROR:极昼，木星今日永远在地平线上！")
-	// ERR_SATURN_NEVER_DOWN deprecated -- use ERR_SATURN_NEVER_SET instead
+	// ERR_SATURN_NEVER_DOWN deprecated: -- use ERR_SATURN_NEVER_SET instead
 	ERR_SATURN_NEVER_DOWN = ERR_SATURN_NEVER_SET
 )
 
@@ -129,7 +129,7 @@ func RiseTime(date time.Time, lon, lat, height float64, aero bool) (time.Time, e
 	return basic.JDE2DateByZone(riseJde, date.Location(), true), err
 }
 
-// deprecated -- use SetTime instead
+// deprecated: -- use SetTime instead
 // DownTime 落下时间
 // date，取日期，时区忽略
 // lon，经度，东正西负
diff --git a/star/star.go b/star/star.go
index 8a4f412..5e89202 100644
--- a/star/star.go
+++ b/star/star.go
@@ -11,7 +11,7 @@ import (
 var (
 	ERR_STAR_NEVER_RISE = errors.New("ERROR:极夜，星星在今日永远在地平线下！")
 	ERR_STAR_NEVER_SET  = errors.New("ERROR:极昼，星星在今日永远在地平线上！")
-	// ERR_STAR_NEVER_DOWN deprecated -- use ERR_STAR_NEVER_SET instead
+	// ERR_STAR_NEVER_DOWN deprecated: -- use ERR_STAR_NEVER_SET instead
 	ERR_STAR_NEVER_DOWN = ERR_STAR_NEVER_SET
 )
 
@@ -59,7 +59,7 @@ func RiseTime(date time.Time, ra, dec, lon, lat, height float64, aero bool) (tim
 	return basic.JDE2DateByZone(riseJde, date.Location(), true), err
 }
 
-// deprecated -- use SetTime instead
+// deprecated: -- use SetTime instead
 // DownTime 星星降落时间
 //
 //	date, 世界时（忽略此处时区）
diff --git a/sun/sun.go b/sun/sun.go
index 8b242be..7e248c2 100644
--- a/sun/sun.go
+++ b/sun/sun.go
@@ -10,7 +10,7 @@ import (
 var (
 	ERR_SUN_NEVER_RISE = errors.New("ERROR:极夜，太阳在今日永远在地平线下！")
 	ERR_SUN_NEVER_SET  = errors.New("ERROR:极昼，太阳在今日永远在地平线上！")
-	// ERR_SUN_NEVER_DOWN deprecated -- use ERR_SUN_NEVER_RISE instead
+	// ERR_SUN_NEVER_DOWN deprecated: -- use ERR_SUN_NEVER_RISE instead
 	ERR_SUN_NEVER_DOWN      = ERR_SUN_NEVER_SET
 	ERR_TWILIGHT_NOT_EXISTS = errors.New("ERROR:今日晨昏朦影不存在！")
 )
@@ -54,7 +54,7 @@ func RiseTime(date time.Time, lon, lat, height float64, aero bool) (time.Time, e
 	return basic.JDE2DateByZone(riseJde, date.Location(), true), err
 }
 
-// deprecated -- use SetTime instead
+// deprecated: -- use SetTime instead
 // DownTime 太阳落下时间
 // date，当地时区日期，务必做时区修正
 // lon，经度，东正西负
diff --git a/uranus/uranus.go b/uranus/uranus.go
index b1353c9..3501f8c 100644
--- a/uranus/uranus.go
+++ b/uranus/uranus.go
@@ -11,7 +11,7 @@ import (
 var (
 	ERR_URANUS_NEVER_RISE = errors.New("ERROR:极夜，天王星今日永远在地平线下！")
 	ERR_URANUS_NEVER_SET  = errors.New("ERROR:极昼，天王星今日永远在地平线上！")
-	// ERR_URANUS_NEVER_DOWN deprecated -- use ERR_URANUS_NEVER_SET instead
+	// ERR_URANUS_NEVER_DOWN deprecated: -- use ERR_URANUS_NEVER_SET instead
 	ERR_URANUS_NEVER_DOWN = ERR_URANUS_NEVER_SET
 )
 
@@ -129,6 +129,7 @@ func RiseTime(date time.Time, lon, lat, height float64, aero bool) (time.Time, e
 	return basic.JDE2DateByZone(riseJde, date.Location(), true), err
 }
 
+// deprecated: -- use SetTime instead
 // DownTime 落下时间
 // date，取日期，时区忽略
 // lon，经度，东正西负
@@ -136,6 +137,16 @@ func RiseTime(date time.Time, lon, lat, height float64, aero bool) (time.Time, e
 // height，高度
 // aero，true时进行大气修正
 func DownTime(date time.Time, lon, lat, height float64, aero bool) (time.Time, error) {
+	return SetTime(date, lon, lat, height, aero)
+}
+
+// SetTime 落下时间
+// date，取日期，时区忽略
+// lon，经度，东正西负
+// lat，纬度，北正南负
+// height，高度
+// aero，true时进行大气修正
+func SetTime(date time.Time, lon, lat, height float64, aero bool) (time.Time, error) {
 	var err error
 	var aeroFloat float64
 	if aero {
diff --git a/venus/venus.go b/venus/venus.go
index dc1f4c0..5fcabb5 100644
--- a/venus/venus.go
+++ b/venus/venus.go
@@ -11,7 +11,7 @@ import (
 var (
 	ERR_VENUS_NEVER_RISE = errors.New("ERROR:极夜，金星今日永远在地平线下！")
 	ERR_VENUS_NEVER_SET  = errors.New("ERROR:极昼，金星今日永远在地平线上！")
-	// ERR_VENUS_NEVER_DOWN deprecated -- use ERR_VENUS_NEVER_SET instead
+	// ERR_VENUS_NEVER_DOWN deprecated: -- use ERR_VENUS_NEVER_SET instead
 	ERR_VENUS_NEVER_DOWN = ERR_VENUS_NEVER_SET
 )
 
@@ -129,6 +129,7 @@ func RiseTime(date time.Time, lon, lat, height float64, aero bool) (time.Time, e
 	return basic.JDE2DateByZone(riseJde, date.Location(), true), err
 }
 
+// deprecated: -- use SetTime instead
 // DownTime 落下时间
 // date，取日期，时区忽略
 // lon，经度，东正西负
@@ -136,6 +137,16 @@ func RiseTime(date time.Time, lon, lat, height float64, aero bool) (time.Time, e
 // height，高度
 // aero，true时进行大气修正
 func DownTime(date time.Time, lon, lat, height float64, aero bool) (time.Time, error) {
+	return SetTime(date, lon, lat, height, aero)
+}
+
+// SetTime 落下时间
+// date，取日期，时区忽略
+// lon，经度，东正西负
+// lat，纬度，北正南负
+// height，高度
+// aero，true时进行大气修正
+func SetTime(date time.Time, lon, lat, height float64, aero bool) (time.Time, error) {
 	var err error
 	var aeroFloat float64
 	if aero {
diff --git a/venus/venus_test.go b/venus/venus_test.go
index 3c9eedc..2b907df 100644
--- a/venus/venus_test.go
+++ b/venus/venus_test.go
@@ -10,5 +10,5 @@ func TestVenus(t *testing.T) {
 	date := time.Now().Add(time.Hour * -24)
 	fmt.Println(CulminationTime(date, 115))
 	fmt.Println(RiseTime(date, 115, 23, 0, false))
-	fmt.Println(DownTime(date, 115, 23, 0, false))
+	fmt.Println(SetTime(date, 115, 23, 0, false))
 }