<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-26 -057 10:30:00.000"
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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 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" >
2026.02.26 (057) 10:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202605702261030009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="9.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.107" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.452" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.200" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.410" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="111.026" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="101.953" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="11.753" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="355.000" 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="2.407" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="287.065" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="224.092" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.667" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="87.639" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="25.088" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="48.493" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="88.270" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.130" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="132">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 240.000 240.000 240.000 240.000 240.000 245.000 245.000 245.000 245.000 250.000 255.000 255.000 255.000 250.000 250.000 250.000 252.500 255.000 255.000 255.000 255.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 265.000 265.000 265.000 265.000 260.000 260.000 262.500 265.000 265.000 270.000 270.000 270.000 265.000 267.500 270.000 271.250 272.500 273.750 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 276.667 278.333 280.000 281.667 283.333 285.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 315.000 315.000 320.000 320.000 320.000 325.000 325.000 325.000 330.000 330.000 330.000 335.000 335.000 340.000 340.000 340.000 345.000 350.000 350.000 355.000 355.000 360.000 365.000 367.855 371.268 375.419 380.577 387.160 395.850 407.855 425.518 454.069 508.068
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 48 69 69 69 69 69 63 57 63 63 63 63 66 66 0 66 75 0 66 0 69 69 66 0 75 75 75 72 72 69 69 69 69 69 69 66 60 0 60 0 63 51 0 69 60 0 0 0 72 0 72 0 0 0 60 63 0 0 69 72 75 0 72 72 75 57 48 0 0 0 0 66 54 0 0 60 63 0 66 66 63 69 69 69 66 66 72 75 75 69 75 78 78 75 78 75 75 75 75 66 69 66 54 57 66 60 66 69 66 63 57 63 51 51 60 63 60 66 66 66 48 69 69 69 60 60 57 54 51 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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 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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="5">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.2 2.25 2.3 2.35 2.4
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
111.026 112.749 114.709 116.986 119.713
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 54 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 2.734375 -0.390625 1.171875 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="181">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.0 95.0 100.0 101.953 105.0 108.006 110.0 114.059 115.0 120.0 120.112 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 287.065 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 1.947 2.376 2.41 2.378 2.284 2.284 2.284 2.304 2.408 2.41 2.552 2.687 2.818 2.949 3.083 3.22 3.364 3.514 3.673 3.844 4.027 4.225 4.441 4.677 4.938 5.224 5.537 5.877 6.239 6.616 6.999 7.377 7.743 8.088 8.41 8.704 8.968 9.199 9.396 9.556 9.677 9.758 9.796 9.8 9.797 9.775 9.736 9.679 9.607 9.521 9.422 9.312 9.191 9.06 8.922 8.776 8.625 8.468 8.307 8.142 7.974 7.805 7.634 7.461 7.289 7.117 6.945 6.774 6.604 6.435 6.269 6.104 5.942 5.782 5.625 5.47 5.318 5.169 5.023 4.881 4.741 4.604 4.47 4.34 4.213 4.088 3.967 3.849 3.734 3.622 3.513 3.407 3.304 3.203 3.106 3.011 2.919 2.829 2.742 2.658 2.576 2.496 2.419 2.344 2.271 2.2 2.132 2.065 2.001 1.938 1.878 1.819 1.762 1.707 1.653 1.601 1.551 1.502 1.455 1.409 1.365 1.322 1.28 1.24 1.201 1.163 1.126 1.091 1.056 1.023 0.991 0.959 0.929 0.9 0.871 0.844 0.817 0.791 0.766 0.742 0.718 0.696 0.674 0.652 0.632 0.612 0.592 0.574 0.555 0.538 0.521 0.504 0.488 0.473 0.458 0.443 0.429 0.416 0.403 0.39 0.377 0.365 0.354 0.343 0.332 0.321 0.311 0.301 0.292 0.282 0.273 0.265 0.256 0.248 0.24 0.233 0.225 0.218 0.211 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.41" PeakHeight="101.953" Num="3" Error="3.894">
-17.401 6.973 -1.525
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.41" EndFrequency="9.8" PeakHeight="287.065" Num="5" zHalfNm="224.092" Error="2.264">
-141.283 -21.172 -7.355 1.173 1.684
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="18.159" Depth="0.126"/>
<TopsideChapman PeakHeight="287.065" PeakDensity="1191563.2" PeakScaleHeight="48.493" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
