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{
"metadata": {
"name": "raju chapter2"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": "Chapter 2:Basic Radars"
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": "Example 1,Page No:74"
},
{
"cell_type": "code",
"collapsed": false,
"input": "import math\n\n#variable declaration\n\nTdelay = 200*10**-6; #time delay in sec\nVo = 3*10**8; #velocity in m/s\n\n#Calculations\n\nR = (Vo*Tdelay)/float(2); #Range of the target in kms\n\n\n#result\n\nprint'Range of the target is %g'%(R/1000),'Kms';",
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": "Range of the target is 30 Kms\n"
}
],
"prompt_number": 4
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": "Example 2,Page No:74"
},
{
"cell_type": "code",
"collapsed": false,
"input": "import math\n\n#variable declaration\nPt = 5000; #Peak tx power in watts\nPav = 1000; #Average Power\nPRF1 = 10; #Pulse repetition frequency in khz\nPRF2 = 20; #Pulse repetition frequency in khz\n\n#Calculations\n\nD = Pav/float(Pt); #Duty cycle\nPRI1 = 1/float(PRF1); #Pulse repetitive interval in msec\nPRI2 = 1/float(PRF2); #Pulse repetitive interval in msec\nPW1 = D*PRI1; #Pulse Width in msec\nPW2 = D*PRI2; #Pulse Width in msec\nPE1 = Pt*PW1; #Pulse Energy in joules\nPE2 = Pt*PW2; #Pulse Energy in joules\n\n#result\nprint'Duty cycle is ',D; \nprint'pulse repetition interval 1 is ',PRI1,'msec';\nprint'pulse repetition interval 2 is ',PRI2,'msec';\nprint'Pulse Width1 is ',PW1*1000,'usec';\nprint'Pulse Width2 is ',PW2*1000,'usec';\nprint'Pulse Energy1 is ',PE1/1000,'J';\nprint'Pulse Energy2 is ',PE2/1000,'J';\n",
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": "Duty cycle is 0.2\npulse repetition interval 1 is 0.1 msec\npulse repetition interval 2 is 0.05 msec\nPulse Width1 is 20.0 usec\nPulse Width2 is 10.0 usec\nPulse Energy1 is 0.1 J\nPulse Energy2 is 0.05 J\n"
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": "Example 3,Page No:75"
},
{
"cell_type": "code",
"collapsed": false,
"input": "import math\n\n#variable declaration\nUR = 200; #unambiguous range in kms\nBW = 1*10**6; #bandwidth in hz\nV0 = 3*10**8; #velocity in m/s\n\n#Calculations\n\nPRF = V0/float((2*UR*10**3)); #pulse repetition frequency in hz\nPRI = 1/float(PRF); #pulse repetition interval in sec\nRR = V0/float((2*BW)); #Range Resolution in mts\nPW = float(2*RR)/float((V0)); #pulse width\n\n#Calculations\n\nprint'pulse repetition frequency is ',PRF ,'Hz';\nprint'pulse repetition interval is %3.3g'%(PRI*1000),'msec';\nprint'Range Resolution is ',RR,'m';\nprint'pulse width is %3.1f'%(PW*10**6),'usec';\n",
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": "pulse repetition frequency is 750.0 Hz\npulse repetition interval is 1.33 msec\nRange Resolution is 150.0 m\npulse width is 1.0 usec\n"
}
],
"prompt_number": 4
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": "Example 4,Page No:76"
},
{
"cell_type": "code",
"collapsed": false,
"input": "import math\n\n#variable declaration\nPt =50000; #peal power in watts\nPRF =1000; #pulse repetitive frequency in hz\nPW =0.8; #pulse width in usec\n \n#Calculations\n\nD = PW*PRF*10**-6; #duty cycle \nPav = Pt*D; #average power\n\n#result\nprint'Duty cycle is %g'%D;\nprint'Average power is %g'%Pav,' Watts';\n",
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": "Duty cycle is 0.0008\nAverage power is 40 Watts\n"
}
],
"prompt_number": 5
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": "Example 5,Page No:76"
},
{
"cell_type": "code",
"collapsed": false,
"input": "import math\n\n#variable declaration\nVo = 3*10**8; #velocity in m/s\nPt = 1*10**6; #peak power in watts\nPW = 1.2*10**-6; #pulse width in sec\nPRI = 1*10**-3; #pulse repetition interval in sec\n\n#Calculations\n\nPRF = 1/float(PRI); #pulse repetition frequency in hz\nPav = Pt*PW*PRF; #average power in watts\nD = Pav/float(Pt); #Duty cycle;\nRmax = Vo/float(2*PRF); #maximum range of the radar in m\n\n#result\n\nprint'pulse repetition frequency is %g'%(PRF/1000),' KHz';\nprint'average power is %g'%(Pav/1000),'KW';\nprint'Duty cycle = %3.2e'%D;\nprint'Maximum range of the radar is %g '%(Rmax/1000),'Km';\n",
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": "pulse repetition frequency is 1 KHz\naverage power is 1.2 KW\nDuty cycle = 1.20e-03\nMaximum range of the radar is 150 Km\n"
}
],
"prompt_number": 7
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": "Example 6,Page No:77"
},
{
"cell_type": "code",
"collapsed": false,
"input": "import math\n\n#variable declaration\nPW = 2*10**-6; #pulse width in sec\nPRF = 800; #pulse repetition frequency in KHz\nV0 = 3*10**8; #velocity in m/s\n\n#Calculations\n\nRu = V0/float(2*PRF); #unambigious range in mts\nRR =(V0*PW)/float(2); #Range resolution in m\n\n#result\nprint'unambigious range is %g'%(Ru/1000),'Km';\nprint'Range resolution is %g '%RR,'m';\n ",
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": "unambigious range is 187.5 Km\n\n Range resolution is 300 m\n"
}
],
"prompt_number": 27
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": "Example 7,Page No:77"
},
{
"cell_type": "code",
"collapsed": false,
"input": "import math\n\n#variable declaration\nRmax = 500; #maximum range in kms\nV0 = 3*10**8; #velocity in m/s;\n\n#calculations\n\nPRF = (V0/float(2*Rmax*10**3)); #pulse repetitive frequency in Hz\n\n\n#result\nprint'pulse repetitive frequency is %g'%PRF,'Hz';\n",
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": "pulse repetitive frequency is 300 Hz\n"
}
],
"prompt_number": 28
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": "Example 8,Page No:77"
},
{
"cell_type": "code",
"collapsed": false,
"input": "import math\n\n#variable declaration\nF = 9; # Noise figure in dB\nBW = 3*10**6; # Bandwidth\nTo = 290; # Temperature in kelvin\nK = 1.38*10**-23; # Boltzman constant\n\n#Calculations\n\nF1 = 10**(F/float(10)); #antilog calculation\nPmin = (K*To*BW)*(F1-1); #minimum receivable power\n\n#result\n\nprint'Minimum receivable power Pmin = %3.3g'%(Pmin*10**12),'pW';\nprint'Note: Calculation error at Pmin in textbook';\n",
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": "Minimum receivable power Pmin = 0.0834 pW\nNote: Calculation error at Pmin in textbook\n"
}
],
"prompt_number": 9
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": "Example 9,Page No:77"
},
{
"cell_type": "code",
"collapsed": false,
"input": "import math\n\n#variable declaration\n\nPt = 500000; #peal power in watts\nF = 10*10**9; #operating frequency in hz\nMRP = 0.1*10**-12; #minimum receivable power in pico watts\nAc = 5; #capture area of antenna in m^2;\nRCS = 20; #radar cross sectional area in m^2;\nVo = 3*10**8; #velocity in m/s\n\n# calculations\n\nlamda =Vo/float(F);\nRmax=((Pt*Ac*Ac*RCS)/float((4*math.pi*lamda*lamda*MRP)))**float(0.25);\n\n#result\n\nprint'Maximum Radar Range is %g '%(Rmax/1000),'kms';",
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": "Maximum Radar Range is 685.681 kms\n"
}
],
"prompt_number": 12
}
],
"metadata": {}
}
]
}
|
