<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-13 -072 12:30:00.000"
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="2 2 0 0 0 0 0 0 0 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match</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" >
2026.03.13 (072) 12:30:00</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">
FF202607203131230009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.032" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="38.814" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" Name="h`F2" 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="12.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="386.973" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.138" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.241" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="303.173" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="243.915" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.210" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="80.799" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="40.955" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="45.259" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="101.330" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.320" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="171">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65 12.7 12.75 12.8
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 220.000 223.333 226.667 230.000 235.000 240.000 245.000 250.000 255.000 260.000 265.000 270.000 270.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 295.000 300.000 302.500 305.000 302.500 300.000 300.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 312.500 315.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 332.500 335.000 335.000 335.000 335.000 335.000 336.250 337.500 338.750 340.000 340.000 345.000 345.714 346.429 347.143 347.857 348.571 349.286 350.000 350.000 345.000 346.667 348.333 350.000 351.667 353.333 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 360.000 360.000 365.000 366.438 367.990 369.672 371.500 373.494 375.677 378.078 380.732 383.680 386.973 390.678 394.875 399.670 405.201 411.651 419.269 428.406 439.564 453.499 471.395
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 0 0 51 0 0 0 0 51 48 48 54 45 51 48 51 51 51 51 54 54 0 57 0 63 0 63 66 66 66 63 0 63 60 60 60 60 57 57 51 51 63 60 60 60 57 54 60 60 63 60 60 57 63 0 60 63 60 60 0 63 63 60 63 0 0 0 63 60 63 60 66 63 66 60 60 66 0 69 66 0 66 63 0 66 63 60 66 69 0 69 66 63 63 69 66 0 69 63 0 66 66 63 0 66 60 0 63 54 0 66 63 0 60 60 0 0 0 60 60 51 0 0 0 0 0 0 48 54 57 0 0 60 0 0 54 0 57 0 0 57 0 51 60 60 57 57 0 0 57 57 0 0 0 0 0 60 63 63 63 60 51 54 0 51 42 0 48 0 42
</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="183">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.523 90.0 95.0 100.0 105.0 110.0 112.611 115.0 115.221 117.832 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 303.173 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.11 2.716 3.036 3.138 3.016 3.016 3.016 3.138 3.216 3.385 3.546 3.703 3.86 4.018 4.178 4.343 4.512 4.688 4.87 5.061 5.261 5.47 5.692 5.925 6.172 6.434 6.712 7.007 7.319 7.649 7.997 8.363 8.743 9.137 9.542 9.954 10.367 10.777 11.177 11.559 11.913 12.226 12.486 12.675 12.781 12.8 12.798 12.772 12.719 12.641 12.539 12.416 12.274 12.115 11.942 11.754 11.556 11.347 11.13 10.906 10.677 10.443 10.206 9.966 9.725 9.484 9.243 9.002 8.763 8.526 8.292 8.061 7.832 7.607 7.386 7.169 6.957 6.748 6.544 6.345 6.15 5.96 5.774 5.593 5.417 5.246 5.079 4.917 4.759 4.606 4.457 4.312 4.172 4.036 3.904 3.776 3.652 3.531 3.415 3.302 3.193 3.087 2.984 2.885 2.789 2.696 2.606 2.519 2.434 2.353 2.274 2.198 2.124 2.052 1.983 1.917 1.852 1.79 1.729 1.671 1.615 1.56 1.508 1.457 1.407 1.36 1.314 1.269 1.227 1.185 1.145 1.106 1.069 1.033 0.998 0.964 0.931 0.9 0.869 0.84 0.811 0.784 0.757 0.732 0.707 0.683 0.66 0.637 0.616 0.595 0.575 0.555 0.536 0.518 0.501 0.484 0.467 0.451 0.436 0.421 0.407 0.393 0.38 0.367 0.354 0.342 0.331 0.32 0.309 0.298 0.288 0.278 0.269 0.26 0.251 0.242 0.234 0.226 0.219 0.211 0.204

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.138" PeakHeight="110.0" Num="3" Error="0.0">
-30.308 12.868 -3.037
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.138" EndFrequency="12.8" PeakHeight="303.173" Num="5" zHalfNm="243.915" Error="3.165">
-142.641 -45.249 0.099 1.109 1.341
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.832" Depth="0.122"/>
<TopsideChapman PeakHeight="303.173" PeakDensity="2032754.4" PeakScaleHeight="45.259" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
