<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-09 -068 20:30:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</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" >
2026.03.09 (068) 20:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606803092030009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.630" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.503" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" 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="0.500" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="505.673" 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="1.897" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="371.171" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="297.115" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.627" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="103.172" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="39.258" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="52.232" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="128.390" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.160" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="169">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.2 3.25 3.3 3.35 3.4 3.45 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 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 250.000 250.000 250.000 250.000 252.500 255.000 255.000 255.000 256.250 257.500 258.750 260.000 261.250 262.500 263.750 265.000 266.250 267.500 268.750 270.000 271.250 272.500 273.750 275.000 275.000 277.500 280.000 282.500 285.000 285.000 287.500 290.000 290.000 292.000 294.000 296.000 298.000 300.000 300.000 300.000 300.000 302.500 305.000 307.500 310.000 312.500 315.000 315.000 315.000 315.000 320.000 322.500 325.000 325.000 325.000 330.000 331.250 332.500 333.750 335.000 336.250 337.500 338.750 340.000 345.000 345.000 345.000 345.000 350.000 352.500 355.000 355.000 355.000 356.250 357.500 358.750 360.000 365.000 370.000 371.000 372.000 373.000 374.000 375.000 380.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 395.000 400.000 400.000 402.500 405.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 417.500 420.000 420.000 425.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 430.000 430.000 435.000 435.000 435.000 437.500 440.000 442.500 445.000 445.000 445.000 445.000 445.000 450.000 450.000 451.250 452.500 453.750 455.000 460.000 460.000 462.500 465.000 465.000 465.000 467.500 470.000 475.000 475.000 475.000 477.500 480.000 485.000 487.500 490.000 490.000 492.000 494.000 496.000 498.000 500.000 500.000 502.584 505.673 509.430 514.097 520.053 527.916
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 54 60 54 51 0 60 60 60 0 60 0 57 0 54 0 54 0 0 0 0 0 0 0 60 57 0 0 0 57 60 51 54 57 0 0 0 0 51 57 60 57 0 57 0 0 0 51 57 0 60 57 0 54 60 60 54 0 0 0 0 0 0 0 60 51 57 60 60 60 0 54 60 63 0 60 0 63 60 51 0 0 0 0 63 57 63 66 63 66 57 63 51 60 66 69 60 66 54 63 0 69 69 66 69 69 66 69 69 66 0 69 66 66 0 66 69 69 66 69 69 0 63 69 0 60 0 0 0 60 0 69 66 60 66 63 0 0 0 60 60 60 51 57 0 60 0 57 48 0 54 0 54 45 0 42 48 0 45 0 0 51 51 0 48 48 48 48 0
</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" >
89.79 90.0 95.0 100.0 105.0 110.0 115.0 118.788 120.0 125.0 127.575 130.0 135.0 136.363 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 371.171 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.218 1.271 1.643 1.836 1.897 1.854 1.762 1.762 1.762 1.762 1.799 1.876 1.897 1.976 2.09 2.211 2.341 2.479 2.627 2.786 2.954 3.133 3.321 3.518 3.721 3.931 4.145 4.363 4.583 4.803 5.025 5.246 5.467 5.688 5.908 6.128 6.347 6.566 6.785 7.004 7.223 7.443 7.663 7.885 8.108 8.332 8.559 8.788 9.02 9.255 9.493 9.736 9.983 10.235 10.491 10.752 11.012 11.263 11.478 11.595 11.6 11.594 11.569 11.525 11.464 11.387 11.295 11.19 11.073 10.945 10.806 10.659 10.504 10.342 10.173 10.0 9.823 9.642 9.458 9.271 9.084 8.895 8.705 8.516 8.326 8.138 7.95 7.764 7.579 7.397 7.216 7.038 6.862 6.689 6.518 6.351 6.186 6.024 5.865 5.71 5.557 5.408 5.262 5.119 4.979 4.843 4.71 4.579 4.452 4.328 4.207 4.089 3.974 3.862 3.753 3.647 3.543 3.442 3.344 3.248 3.155 3.065 2.977 2.891 2.808 2.727 2.648 2.572 2.497 2.425 2.354 2.286 2.22 2.155 2.092 2.031 1.972 1.915 1.859 1.804 1.752 1.701 1.651 1.602 1.556 1.51 1.466 1.423 1.381 1.341 1.301 1.263 1.226 1.19 1.155 1.121 1.088 1.056 1.025 0.995 0.966 0.937 0.91 0.883 0.857 0.832 0.807 0.784 0.761 0.738 0.717 0.695 0.675 0.655 0.636 0.617 0.599 0.581 0.564 0.548 0.531 0.516 0.501 0.486 0.472 0.458 0.444

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.897" PeakHeight="110.0" Num="3" Error="0.0">
-28.902 10.895 -2.203
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.897" EndFrequency="11.6" PeakHeight="371.171" Num="5" zHalfNm="297.115" Error="2.126">
-188.892 -66.101 30.809 -12.94 2.316
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="26.363" Depth="0.135"/>
<TopsideChapman PeakHeight="371.171" PeakDensity="1669478.9" PeakScaleHeight="52.232" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
