<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-16 -075 11:40:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2o cusp</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.03.16 (075) 11:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202607503161140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="32" >
<URSI ID="00" Val="11.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.902" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.067" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="8.850" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.900" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.010" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="135.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="135.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="115.909" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="115.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="410.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="2.921" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.135" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="290.965" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="206.570" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.163" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.750" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="109.350" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="39.526" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="59.643" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="150.740" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.090" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="152">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
150.000 148.750 147.500 146.250 145.000 140.000 140.000 137.500 135.000 135.000 135.000 135.000 135.000 135.000 137.532 140.065 142.597 145.130 147.662 150.195 152.727 155.260 157.792 160.325 162.857 165.390 167.922 170.455 172.987 175.519 178.052 180.584 183.117 185.649 188.182 190.714 193.247 195.779 198.312 200.844 203.377 205.909 208.442 210.974 213.506 216.039 218.571 221.104 223.636 226.169 228.701 231.234 233.766 236.299 238.831 241.364 243.896 246.429 248.961 251.494 254.026 256.558 259.091 261.623 264.156 266.688 269.221 271.753 274.286 276.818 279.351 281.883 284.416 286.948 289.481 292.013 294.545 297.078 299.610 302.143 304.675 307.208 309.740 312.273 314.805 317.338 319.870 322.403 324.935 327.468 330.000 330.000 335.000 335.000 335.000 335.000 335.000 337.500 340.000 342.500 345.000 347.500 350.000 350.833 351.667 352.500 353.333 354.167 355.000 355.000 355.000 360.000 360.000 360.000 360.000 362.500 365.000 370.000 367.500 365.000 370.000 370.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 377.778 380.556 383.333 386.111 388.889 391.667 394.444 397.222 400.000 402.500 405.000 407.500 410.000 415.000 417.500 420.000 425.000 431.135 438.131 446.183 455.549 466.582 479.767
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 0 0 48 57 51 0 54 0 51 0 0 54 45 0 45 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57 66 66 60 54 0 0 0 0 0 54 0 60 0 0 0 63 72 72 63 66 72 69 0 66 51 0 63 66 0 0 66 0 51 63 66 66 0 63 60 0 0 60 57 57 54 45 51 0 54 51 0 51 51 45 0 48 45 48 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="3">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.9 2.95 3.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.909 117.591 119.891
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -1.171875 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="103">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
130.000 130.000 130.000 125.000 125.000 130.000 130.000 130.000 130.000 125.000 125.000 127.500 130.000 125.000 125.000 125.000 125.000 125.000 123.333 121.667 120.000 120.000 122.500 125.000 125.000 125.000 125.000 125.000 125.000 125.000 130.000 129.167 128.333 127.500 126.667 125.833 125.000 124.167 123.333 122.500 121.667 120.833 120.000 120.000 125.000 125.000 125.000 124.167 123.333 122.500 121.667 120.833 120.000 120.000 122.500 125.000 120.000 119.667 119.333 119.000 118.667 118.333 118.000 117.667 117.333 117.000 116.667 116.333 116.000 115.667 115.333 115.000 115.556 116.111 116.667 117.222 117.778 118.333 118.889 119.444 120.000 120.000 120.000 125.000 122.500 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 60 63 54 54 0 54 66 63 72 0 66 72 66 69 0 60 0 0 60 57 0 66 0 66 0 48 69 66 57 0 0 0 0 0 48 0 48 0 0 0 75 75 66 66 63 0 0 0 72 0 78 72 0 63 0 0 0 0 66 0 0 0 0 0 0 0 0 0 0 63 0 0 72 0 0 0 0 0 75 75 81 72 0 81 0 78 78 81 78 0 0 81 0 0 0 0 0 0 0 54 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.545 90.0 95.0 100.0 105.0 110.0 113.571 115.0 117.141 120.0 120.712 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 290.965 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.023 2.605 2.912 3.01 2.884 2.884 2.884 2.985 3.01 4.189 4.633 4.947 5.211 5.447 5.665 5.873 6.072 6.265 6.454 6.641 6.826 7.011 7.195 7.38 7.566 7.754 7.944 8.137 8.334 8.534 8.738 8.947 9.16 9.378 9.6 9.827 10.054 10.281 10.5 10.702 10.873 10.995 11.049 11.05 11.045 11.026 10.993 10.948 10.89 10.821 10.741 10.652 10.554 10.448 10.334 10.214 10.088 9.956 9.819 9.679 9.534 9.386 9.236 9.083 8.929 8.773 8.616 8.458 8.3 8.142 7.984 7.826 7.669 7.513 7.358 7.205 7.052 6.901 6.752 6.605 6.459 6.316 6.174 6.034 5.897 5.762 5.629 5.498 5.37 5.244 5.12 4.999 4.88 4.763 4.648 4.536 4.426 4.319 4.214 4.111 4.01 3.911 3.815 3.72 3.628 3.538 3.45 3.364 3.28 3.198 3.118 3.04 2.963 2.889 2.816 2.745 2.675 2.608 2.541 2.477 2.414 2.353 2.293 2.235 2.178 2.122 2.068 2.015 1.964 1.913 1.865 1.817 1.77 1.725 1.681 1.638 1.596 1.555 1.515 1.476 1.438 1.401 1.365 1.33 1.296 1.262 1.23 1.198 1.167 1.137 1.108 1.079 1.052 1.024 0.998 0.972 0.947 0.923 0.899 0.876 0.853 0.831 0.81 0.789 0.769 0.749 0.729 0.711 0.692 0.674 0.657 0.64 0.623 0.607 0.592 0.576 0.561 0.547 0.533 0.519 0.506 0.493 0.48 0.467 0.455 0.444

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.01" PeakHeight="110.0" Num="3" Error="0.0">
-30.203 12.715 -2.967
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.01" EndFrequency="11.05" PeakHeight="290.965" Num="5" zHalfNm="206.57" Error="3.32">
-161.493 -35.677 31.608 -1.871 -2.82
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.712" Depth="0.126"/>
<TopsideChapman PeakHeight="290.965" PeakDensity="1514919.4" PeakScaleHeight="59.643" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
