From 4762a313afca6d270af11b2ef37c406cddc363ac Mon Sep 17 00:00:00 2001
From: Bigsk <i@ianxia.com>
Date: Tue, 18 Oct 2022 22:26:56 +0800
Subject: [PATCH] zh_CN Python

---
 zh_CN/commu_a_c.py | 136 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 zh_CN/commu_a_c.py

diff --git a/zh_CN/commu_a_c.py b/zh_CN/commu_a_c.py
new file mode 100644
index 0000000..4497c1f
--- /dev/null
+++ b/zh_CN/commu_a_c.py
@@ -0,0 +1,136 @@
+import math
+import sys
+
+sgn = lambda n: 1 if n > 0 else -1 if n < 0 else 0
+fndeg = lambda d, m, s: d + sgn(d) * (m / 60 + s/ 3600)
+fnacs = lambda x: math.pi / 2 - 2 * math.atan(x / (1 + math.sqrt(1 - x * x)))
+    
+def main():
+    print("《计算通信方位角和大圆距离程序》")
+
+    ro = 6370
+
+    while True:
+        tmp = input("发信点经度（度，分，秒）=")
+        try:
+            tmp = [int(t) for t in tmp.split(",")]
+            tlongd = fndeg(tmp[0], tmp[1], tmp[2])
+        except Exception as e:
+            print("错误：", e)
+        else:
+            break
+    while True:
+        tmp = input("发信点纬度（度，分，秒）=")
+        try:
+            tmp = [int(t) for t in tmp.split(",")]
+            tlatd = fndeg(tmp[0], tmp[1], tmp[2])
+        except Exception as e:
+            print("错误：", e)
+        else:
+            break
+    while True:
+        tmp = input("收信点经度（度，分，秒）=")
+        try:
+            tmp = [int(t) for t in tmp.split(",")]
+            rlongd = fndeg(tmp[0], tmp[1], tmp[2])
+        except Exception as e:
+            print("错误：", e)
+        else:
+            break
+    while True:
+        tmp = input("收信点纬度（度，分，秒）=")
+        try:
+            tmp = [int(t) for t in tmp.split(",")]
+            rlatd = fndeg(tmp[0], tmp[1], tmp[2])
+        except Exception as e:
+            print("错误：", e)
+        else:
+            break
+
+    tlong = math.radians(tlongd)
+    tlat = math.radians(tlatd)
+    rlong = math.radians(rlongd)
+    rlat = math.radians(rlatd)
+
+    if tlong < 0:
+        tlong = math.pi * 2 + tlong
+    if rlong < 0:
+        rlong = math.pi * 2 + rlong
+    
+    dlong = tlong - rlong
+    if abs(dlong) > math.pi:
+        dlong = dlong - math.pi * 2 * sgn(dlong)
+    
+    x = math.sin(tlat) * math.sin(rlat) + math.cos(tlat) * math.cos(rlat) * math.cos(dlong)
+    gcd = fnacs(x)
+
+    if gcd < 0.0000001:
+        gcd = 0.0000001
+    
+    if math.cos(tlat) - 0.0000001 <= 0:
+        if tlat >= 0:
+            btr = 0
+        else:
+            btr = math.pi
+        
+        if math.cos(rlat) - 0.0000001 > 0:
+            x = (math.sin(tlat) - math.sin(rlat) * math.cos(gcd)) / (math.cos(rlat) * math.sin(gcd))
+            brt = fnacs(x)
+            if dlong < 0:
+                brt = math.pi * 2 - brt
+                gcdkm = gcd * ro
+                btrd = math.degrees(btr)
+                brtd = math.degrees(brt)
+        else:
+            if rlat >= 0:
+                brt = 0
+            else:
+                brt = math.pi
+            gcdkm = gcd * ro
+            btrd = math.degrees(btr)
+            brtd = math.degrees(brt)
+    else:
+        x = (math.sin(rlat) - math.sin(tlat) * math.cos(gcd)) / (math.cos(tlat) * math.sin(gcd))
+        btr = fnacs(x)
+
+        if dlong > 0:
+            btr = math.pi * 2 -btr
+            
+        if math.cos(rlat) - 0.0000001 > 0:
+            x = (math.sin(tlat) - math.sin(rlat) * math.cos(gcd)) / (math.cos(rlat) * math.sin(gcd))
+            brt = fnacs(x)
+            if dlong < 0:
+                brt = math.pi * 2 - brt
+                gcdkm = gcd * ro
+                btrd = math.degrees(btr)
+                brtd = math.degrees(brt)
+        else:
+            if rlat >= 0:
+                brt = 0
+            else:
+                brt = math.pi
+            gcdkm = gcd * ro
+            btrd = math.degrees(btr)
+            brtd = math.degrees(brt)
+
+    print("大圆距离为", gcdkm, "(km)")
+    d = int(btrd)
+    m = int((btrd - d) * 60)
+    s = (btrd - d - m / 60) * 3600
+    print("发信点对收信点的方位角为", d, "度", m, "分", s, "秒")
+    d = int(brtd)
+    m = int((brtd - d) * 60)
+    s = (brtd - d - m / 60) * 3600
+    print("收信点对发信点的方位角为", d, "度", m, "分", s, "秒")
+
+if __name__ == "__main__":
+    while True:
+        main()
+        while True:
+            a = input("您是否对其他收信点继续计算？(Y/N)")
+            if a.lower() not in ("y", "n"):
+                continue
+            if a.lower() == "y":
+                break
+            else:
+                sys.exit(0)
\ No newline at end of file