1 |
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2 | #include <iostream>
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3 | #include <iomanip>
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4 |
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5 | #ifdef WIN32
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6 | #include <winsock2.h> // link with ws2_32.lib
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7 | #endif
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8 |
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9 | using namespace std;
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10 |
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11 | const char begEpoch = 'A';
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12 | const char begObs = 'B';
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13 | const char endEpoch = 'C';
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14 |
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15 | struct Observation {
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16 | char StatID[5+1]; // Station ID
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17 | char SVPRN; // Satellite PRN
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18 | short GPSWeek; // Week of GPS-Time
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19 | int GPSWeeks; // Second of Week (GPS-Time)
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20 | double sec; // second
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21 | double C1; // CA-code validated raw pseudorange (meters)
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22 | double P2; // P2-code validated raw pseudorange (meters)
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23 | double L1; // validated raw carrier phase (meters)
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24 | double L2; // validated raw carrier phase (meters)
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25 | short SNR1; // signal-to noise ration (0.1 dB)
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26 | short SNR2; // signal-to noise ration (0.1 dB)
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27 | int pCodeIndicator; // 0 ... CA Code, 1 ... P Code
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28 | unsigned cumuLossOfCont; // 0 to 31
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29 | } ;
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30 |
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31 | int main(int argc, char* argv[]) {
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32 |
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33 | // Initialize Winsock
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34 | // ------------------
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35 | WSADATA wsaData;
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36 | int iResult = WSAStartup(MAKEWORD(2,2), &wsaData);
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37 | if (iResult != NO_ERROR) {
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38 | cerr << "Error at WSAStartup" << endl;
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39 | return 1;
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40 | }
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41 |
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42 | // Create a SOCKET for connecting to server
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43 | // ----------------------------------------
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44 | SOCKET ConnectSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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45 | if (ConnectSocket == INVALID_SOCKET) {
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46 | cerr << "Error at socket: " << WSAGetLastError() << endl;
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47 | WSACleanup();
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48 | return 1;
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49 | }
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50 |
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51 | // The sockaddr_in structure specifies the address family,
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52 | // IP address, and port of the server to be connected to.
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53 | // -------------------------------------------------------
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54 | sockaddr_in clientService;
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55 | clientService.sin_family = AF_INET;
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56 | clientService.sin_addr.s_addr = inet_addr( "127.0.0.1" );
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57 | clientService.sin_port = htons(1968);
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58 |
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59 | // Connect to server
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60 | // -----------------
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61 | if (connect( ConnectSocket, (SOCKADDR*) &clientService,
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62 | sizeof(clientService) ) == SOCKET_ERROR) {
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63 | cerr << "Failed to connect" << endl;
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64 | WSACleanup();
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65 | return 1;
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66 | }
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67 |
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68 | // Receive Data
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69 | // ------------
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70 | int bytesRecv = 0;
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71 | Observation obs;
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72 | char flag = ' ';
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73 | cout.setf(ios::showpoint | ios::fixed);
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74 | while (true) {
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75 | if (bytesRecv == SOCKET_ERROR) {
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76 | cerr << "recv failed: " << WSAGetLastError() << endl;
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77 | break;
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78 | }
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79 | else {
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80 | bytesRecv = recv( ConnectSocket, &flag, 1, 0 );
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81 | if (flag == begObs) {
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82 | bytesRecv = recv( ConnectSocket, (char*) &obs, sizeof(obs), 0);
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83 | cout << setw(5) << obs.StatID << " "
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84 | << setw(2) << (int) obs.SVPRN << " "
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85 | << setw(4) << obs.GPSWeek << " "
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86 | << setw(6) << obs.GPSWeeks << " "
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87 | << setw(8) << setprecision(4) << obs.sec << " "
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88 | << setw(14) << setprecision(4) << obs.C1 << " "
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89 | << setw(14) << setprecision(4) << obs.P2 << " "
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90 | << setw(14) << setprecision(4) << obs.L1 << " "
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91 | << setw(14) << setprecision(4) << obs.L2 << " "
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92 | << setw(4) << obs.SNR1 << " "
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93 | << setw(4) << obs.SNR2 << " "
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94 | << setw(4) << obs.pCodeIndicator << " "
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95 | << setw(4) << obs.cumuLossOfCont << endl;
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96 | }
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97 | }
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98 | }
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99 |
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100 | WSACleanup();
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101 | return 0;
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102 | }
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103 |
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104 |
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