<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-23 -082 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" >
2026.03.23 (082) 20:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608203232030009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.866" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.528" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="405.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.820" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="326.500" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="262.099" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.629" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="90.003" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="34.193" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="46.380" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="89.770" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.870" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="185">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 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 11.65 11.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 255.000 255.000 250.000 251.667 253.333 255.000 255.000 255.000 255.000 255.000 255.000 255.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 262.500 265.000 265.000 265.000 265.000 266.250 267.500 268.750 270.000 270.000 270.000 270.000 265.000 267.500 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 275.000 275.000 277.500 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 281.667 283.333 285.000 285.000 285.000 285.714 286.429 287.143 287.857 288.571 289.286 290.000 290.000 290.000 295.000 290.000 290.000 292.500 295.000 297.500 300.000 300.000 300.000 300.000 301.667 303.333 305.000 306.667 308.333 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 317.500 320.000 320.000 320.000 322.500 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 330.000 332.500 335.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 360.000 360.000 361.667 363.333 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 402.500 405.000 405.000 410.000 415.000 420.000 425.000 425.000 430.000 435.000 440.000 440.000 445.329 451.472 458.630 467.076 477.194 489.535
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 63 54 51 0 0 51 60 66 69 72 72 72 72 72 72 72 69 0 0 69 66 66 69 0 69 69 69 66 0 0 0 60 0 0 69 63 0 72 72 69 0 66 66 66 66 63 63 60 66 66 0 66 69 0 66 0 0 0 0 0 66 0 69 0 66 66 0 66 60 0 0 69 66 66 0 0 0 0 0 0 72 69 69 69 69 60 0 0 0 66 66 69 72 0 0 63 0 51 54 57 63 0 69 72 57 69 66 45 72 75 60 66 0 72 0 60 66 66 72 69 60 66 69 69 72 72 66 72 57 63 69 69 72 60 63 69 66 69 66 66 66 69 63 63 54 60 0 0 57 60 51 57 60 51 57 45 54 54 57 57 48 54 48 54 57 54 0 54 51 54 54 51 48 54 51 51 48 51 51 48 51 51 48 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -1.953125
</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" >
89.816 90.0 95.0 100.0 105.0 110.0 115.0 119.235 120.0 125.0 128.47 130.0 135.0 137.705 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 326.5 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.216 1.218 1.576 1.761 1.82 1.781 1.684 1.684 1.684 1.684 1.707 1.78 1.82 1.876 1.989 2.098 2.206 2.316 2.43 2.549 2.676 2.812 2.959 3.121 3.301 3.504 3.735 4.001 4.309 4.666 5.07 5.512 5.973 6.433 6.881 7.31 7.721 8.113 8.49 8.852 9.201 9.539 9.866 10.182 10.485 10.773 11.042 11.283 11.484 11.627 11.696 11.7 11.694 11.663 11.609 11.534 11.438 11.325 11.196 11.052 10.895 10.726 10.548 10.362 10.168 9.968 9.764 9.555 9.344 9.13 8.915 8.7 8.485 8.27 8.057 7.845 7.635 7.428 7.224 7.022 6.824 6.629 6.438 6.25 6.066 5.886 5.711 5.539 5.371 5.207 5.048 4.892 4.741 4.593 4.45 4.311 4.175 4.043 3.915 3.791 3.67 3.553 3.439 3.328 3.221 3.118 3.017 2.919 2.825 2.733 2.644 2.558 2.475 2.394 2.316 2.241 2.167 2.096 2.028 1.961 1.897 1.835 1.774 1.716 1.66 1.605 1.552 1.501 1.452 1.404 1.358 1.313 1.27 1.228 1.187 1.148 1.11 1.073 1.038 1.004 0.971 0.938 0.907 0.877 0.848 0.82 0.793 0.767 0.742 0.717 0.693 0.67 0.648 0.627 0.606 0.586 0.567 0.548 0.53 0.512 0.495 0.479 0.463 0.448 0.433 0.418 0.405 0.391 0.378 0.366 0.354 0.342 0.331 0.32 0.309 0.299 0.289 0.279 0.27 0.261 0.253 0.244 0.236 0.228 0.221 0.213 0.206

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.82" PeakHeight="110.0" Num="3" Error="0.0">
-28.769 10.721 -2.136
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.82" EndFrequency="11.7" PeakHeight="326.5" Num="5" zHalfNm="262.099" Error="4.456">
-155.932 -30.43 0.805 -8.405 5.167
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="27.705" Depth="0.136"/>
<TopsideChapman PeakHeight="326.5" PeakDensity="1698387.1" PeakScaleHeight="46.38" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
