曝光台 注意防骗
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3 Not assigned
4.3.8.4.2.3.2.3 CVC (cancel vertical RAC). This 2-bit (43-44) subfield shall denote the cancellation of a vertical
RAC previously sent to the addressed aircraft. This subfield shall be set to 0 for a new threat.
Coding
0 No cancellation
1 Cancel previously sent "Do not pass below"
2 Cancel previously sent "Do not pass above"
3 -Not assigned
4.3.8.4.2.3.2.4 HRC (horizontal RAC). This 3-bit (50-52) subfield shall denote a horizontal RAC relating to the
addressed aircraft.
Chapter 4 Annex 10 - Aeronautical Telecomniunications
No horizontal RAC or no horizontal resolution capability
Other ACAS sense is turn left; do not turn left
Other ACAS sense is turn left; do not turn right
Not assigned
Not assigned
Other ACAS sense is turn right; do not turn left
Other ACAS sense is lurn right; do not turn right
Not assigned
4.3.8.4.2.3.2.5 CHC (ccmcel horizontal RAC). This 3-hit (47-49) subfield shall denote the cancellatinn of a horizontal
RAC previously sent to the addressed aircraft. This subfield shall be set to 0 for a new threat.
Coding
0 No cancellation or no horizontal resolution capability
1 Cancel previously sent "Do not turn left"
2 Cancel previously sent "Do not turn right"
3-7 Not assigned
4.3.8.1.2.3.2.6 VSB (vertical sense bits subfield). This 4-bit (61-64) subtield shall be used to protect the data in the
CVC and VRC subfields. For each of the 16 possible combinations of bits 43-46 the following VSB code shall be
transmitted:
Coding
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
cvc
43 44
0 0
0 0
0 0
0 0
0 1
0 1
0 1
0 1
I 0
1 0
1 0
1 0
1 1
1 1
1 1
1 1
VRC
45 46
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
VSB
62 63
0 0
1 1
I 1
0 0
0 1
1 0
1 0
0 1
1 0
0 1
0 1
1 0
1. 1
0 0
0 0
1 I
Note.- The rule used to generate the VSB subfield bit setting is a distance 3 Hamming code augmented with a parity
bit, producing the abiliiy to detect up to three errors in the eight transmitted bits.
4.3.8.4.2.3.2.7 HSB (horizontal sense bits subfield). This 5-bit (56-60) subfield shall be used to protect the data in the
CHC and HRC subfields. For each of the 64 possible combinations of bits 47-52 the following HSB code shall be
transmitted:
Annex 10 - Aeronautical Telecommunications Volume lV
CHC HRC
Coding 47 48 49 50 51 52
0 0 0 0 0 0 0
1 0 0 0 0 0 1
2 0 0 0 0 1 0
3 0 0 0 0 1 1
4 0 0 0 1 0 0
5 0 0 0 1 0 1
6 0 0 0 1 1 0
7 0 0 0 1 1 1
8 0 0 1 0 0 0
9 0 0 1 0 0 1
10 0 0 1 0 1 0
11 0 0 1 0 1 1
12 0 0 1 1 0 0
13 0 0 1 1 0 I
1 4 0 0 1 1 I 0
15 0 0 I 1 1 1
16 0 1 0 0 0 0
17 0 1 0 0 0 1
18 0 1 0 0 1 0
19 0 1 0 0 1 1
20 0 1 0 I 0 0
21 0 1 0 1 0 1
22 0 1 0 1 1 0
23 0 1 0 1 1 1
24 0 1 1 0 0 0
25 0 1 1 0 0 I
26 0 I 1 0 1 0
27 0 1 1 0 1 1
28 0 1 1 1 0 0
29 0 1 1 1 0 1
30 0 1 1 1 1 0
31 0 1 1 1 1 1
32 1 0 0 0 0 0
33 1 0 0 0 0 1
34 1 0 0 0 1 0
35 1 0 0 0 1 1
36 1 0 0 1 0 0
37 1. 0 0 1 0 1
38 1 0 0 1 1 0
39 1 0 0 1 3 1
40 I O Z O O O
41 1 0 1 0 0 1
42 1 0 1 0 1 0
43 1 0 1 0 1 I
44 1 0 1 1 0 0
45 1 0 1 1 0 I
46 I 0 1 1 1 0
47 1 0 1 1 I I
48 1 1 0 0 0 0
49 1 1 0 0 0 I
50 1 1 0 0 1 0
5 I 1 1 0 0 1 I
52 I 1 0 1 0 0
53 1 1 0 1 0 1
54 1 1 0 1 1 0
5 5 I 1 0 1 1 1
HSB
56 57 58 59 60
0 0 0 0 0
0 1 0 1 1
1 0 0 1 1
1 1 0 0 0
I 1 1 0 0
1 0 1 1 1
0 1 1 1 1
0 0 1 0 0
0 1 1 0 1
0 0 1 1 0
1 1 1 1 0
1 0 1 0 1
1 0 0 0 1
I 1 0 1 0
0 0 0 1 0
0 1 0 0 1
1 0 1 0 1
1 1 1 1 0
0 0 1 1 0
0 1 1 0 1
0 1 0 0 1
0 0 0 1 0
1 1 0 1 0
1 0 0 0 1
1 1 0 0 0
1 0 0 1 1
0 1 0 1 1
0 0 0 0 0
0 0 1 0 0
0 1 1 1 1
1 0 1 1 1
1 1 1 0 0
1 1 0 0 1
1 0 0 1 0
0 1 0 1 0
0 0 0 0 1
0 0 1 0 1
0 I 1 1 0
1 0 1 1 0
1 1 1 0 1
1 0 1 0 0
1 1 1 1 1
0 0 1 1 1
0 I 1 0 0
O I O O O
0 0 0 1 1
1 1 0 1 1
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