<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-25 -084 12:10:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x 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" >
2026.03.25 (084) 12:10:00</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">
FF202608403251210009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.937" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.612" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="255.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="255.000" 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="8.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="385.000" 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="3.069" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.208" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="295.092" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="213.881" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.186" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="106.616" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="28.834" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="60.487" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="132.120" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.460" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="94">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 257.500 260.000 260.000 260.000 261.000 262.000 263.000 264.000 265.000 265.000 270.000 275.000 275.000 275.000 275.000 275.000 275.000 277.500 280.000 280.000 280.000 280.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 290.000 290.000 295.000 296.000 297.000 298.000 299.000 300.000 302.500 305.000 307.500 310.000 310.000 312.500 315.000 315.000 315.000 315.000 320.000 320.000 320.000 325.000 326.667 328.333 330.000 331.667 333.333 335.000 336.667 338.333 340.000 340.000 343.333 346.667 350.000 350.000 350.000 355.000 355.000 360.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 395.000 400.000 405.000 405.000 410.000 414.103 419.093 425.294 433.206 443.653 458.083 479.312 513.624
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 48 54 48 0 0 48 0 45 45 0 0 0 57 0 60 66 0 60 60 63 66 63 66 66 63 63 63 63 60 57 60 0 0 60 45 63 0 63 0 57 60 0 54 57 63 60 48 57 57 54 0 0 0 0 0 57 0 0 60 60 0 0 54 66 66 60 66 60 51 63 72 66 69 66 69 66 63 66 69 66 63 60 69 69 66 63 60 57 57 60 54 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -1.171875 0.390625 0.390625 0.390625 -2.734375 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -1.953125 -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 -1.171875
</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" >
89.534 90.0 95.0 100.0 105.0 110.0 112.91 115.0 115.819 118.729 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 295.092 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.063 2.656 2.969 3.069 2.947 2.947 2.947 3.069 3.124 3.323 3.504 3.678 3.848 4.017 4.186 4.357 4.531 4.708 4.888 5.072 5.26 5.453 5.65 5.851 6.057 6.266 6.479 6.695 6.914 7.135 7.356 7.578 7.797 8.014 8.226 8.431 8.626 8.808 8.973 9.117 9.236 9.325 9.381 9.4 9.4 9.394 9.376 9.347 9.308 9.258 9.199 9.132 9.057 8.974 8.885 8.789 8.688 8.582 8.472 8.357 8.239 8.118 7.994 7.868 7.74 7.611 7.48 7.349 7.217 7.084 6.951 6.819 6.687 6.555 6.424 6.293 6.164 6.036 5.909 5.784 5.659 5.537 5.416 5.296 5.179 5.063 4.949 4.836 4.726 4.617 4.511 4.406 4.303 4.202 4.103 4.006 3.911 3.818 3.727 3.637 3.55 3.464 3.38 3.298 3.218 3.139 3.063 2.988 2.914 2.843 2.772 2.704 2.637 2.572 2.508 2.446 2.385 2.325 2.267 2.211 2.156 2.102 2.049 1.998 1.948 1.899 1.851 1.804 1.759 1.715 1.672 1.629 1.588 1.548 1.509 1.471 1.434 1.398 1.362 1.328 1.294 1.261 1.229 1.198 1.168 1.138 1.109 1.081 1.054 1.027 1.001 0.975 0.951 0.927 0.903 0.88 0.858 0.836 0.815 0.794 0.774 0.754 0.735 0.716 0.698 0.68 0.663 0.646 0.63 0.613 0.598 0.583 0.568 0.553 0.539 0.526 0.512 0.499 0.486 0.474 0.462 0.45 0.439 0.427 0.417 0.406

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.069" PeakHeight="110.0" Num="3" Error="0.0">
-30.252 12.786 -3.0
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.069" EndFrequency="9.4" PeakHeight="295.092" Num="5" zHalfNm="213.881" Error="2.253">
-153.626 -29.326 5.571 0.502 0.516
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.729" Depth="0.122"/>
<TopsideChapman PeakHeight="295.092" PeakDensity="1096277.9" PeakScaleHeight="60.487" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
