<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-02 -061 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="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" >
2026.03.02 (061) 12:10:00</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">
FF202606103021210009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="10.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.726" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.710" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.300" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.110" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="215.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="215.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="101.246" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="100.538" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="10.295" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" 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="3.046" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.197" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="328.745" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="242.215" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.185" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="110.727" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="40.021" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="61.100" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="148.470" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.160" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="136">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
215.000 215.000 217.500 220.000 221.667 223.333 225.000 230.000 232.500 235.000 240.000 242.500 245.000 250.000 255.000 257.500 260.000 262.500 265.000 267.500 270.000 272.500 275.000 275.000 275.000 280.000 282.500 285.000 285.000 285.000 286.667 288.333 290.000 290.000 295.000 296.250 297.500 298.750 300.000 301.250 302.500 303.750 305.000 306.250 307.500 308.750 310.000 310.000 310.000 311.000 312.000 313.000 314.000 315.000 320.000 320.000 320.000 320.000 322.222 324.444 326.667 328.889 331.111 333.333 335.556 337.778 340.000 345.000 345.000 346.250 347.500 348.750 350.000 355.000 356.667 358.333 360.000 362.500 365.000 365.000 365.000 370.000 370.000 375.000 380.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 415.000 415.000 420.000 420.000 420.000 425.000 425.000 430.000 430.000 432.500 435.000 435.000 435.000 440.000 440.000 440.000 445.000 445.000 447.500 450.000 450.000 450.000 455.000 455.000 460.000 465.000 465.000 465.000 465.000 470.000 474.293 479.516 486.004 494.283 505.213 520.309
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 0 51 0 0 54 54 0 60 54 0 57 54 48 0 0 54 0 0 54 0 60 51 45 54 0 48 54 51 0 0 63 60 48 0 0 0 0 0 0 0 0 0 0 0 63 66 69 0 0 0 0 60 66 66 63 57 0 0 0 0 0 0 0 0 60 51 51 0 0 0 63 57 0 0 63 48 57 66 69 69 69 69 57 63 63 63 69 69 72 69 75 69 72 66 72 72 69 60 69 69 66 69 69 66 66 51 51 45 48 54 54 51 51 57 51 51 45 57 60 60 57 54 54 45 54 54 51 48 48 48 0 0 0 0
</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 2.734375 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 -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 -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 2.734375 -0.390625 -0.390625 -0.390625 2.734375 2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="17">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.3 2.35 2.4 2.45 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
101.246 101.609 101.994 102.401 102.834 103.295 103.789 104.319 104.891 105.513 106.194 106.946 107.788 108.745 109.856 111.188 112.864
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 0 0 0 0 0 0 0 0 0 0 54 54 0 51 0
</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 -1.171875 -1.171875 0.390625 1.953125 2.734375 -2.734375 0.390625 -2.734375 2.734375 -0.390625 0.390625
</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" >
90.0 95.0 100.0 100.538 103.549 105.0 106.559 109.57 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 328.745 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.622 3.106 3.11 2.986 2.986 2.986 3.11 3.122 3.255 3.389 3.525 3.662 3.804 3.949 4.099 4.253 4.413 4.577 4.747 4.921 5.1 5.283 5.47 5.66 5.852 6.046 6.241 6.438 6.635 6.832 7.029 7.227 7.424 7.62 7.817 8.013 8.21 8.406 8.603 8.8 8.998 9.197 9.396 9.597 9.799 10.001 10.203 10.401 10.59 10.756 10.871 10.9 10.9 10.889 10.865 10.829 10.781 10.721 10.652 10.573 10.484 10.388 10.284 10.174 10.057 9.934 9.807 9.675 9.539 9.4 9.258 9.113 8.966 8.817 8.667 8.516 8.364 8.212 8.06 7.907 7.756 7.604 7.454 7.304 7.156 7.009 6.863 6.719 6.576 6.435 6.296 6.159 6.023 5.89 5.759 5.629 5.502 5.377 5.254 5.134 5.015 4.899 4.785 4.673 4.563 4.456 4.35 4.247 4.146 4.047 3.95 3.855 3.762 3.672 3.583 3.496 3.411 3.328 3.247 3.167 3.09 3.014 2.94 2.868 2.797 2.728 2.661 2.595 2.531 2.469 2.407 2.348 2.289 2.232 2.177 2.123 2.07 2.018 1.968 1.919 1.871 1.824 1.779 1.734 1.691 1.648 1.607 1.567 1.528 1.489 1.452 1.416 1.38 1.345 1.312 1.279 1.247 1.215 1.185 1.155 1.126 1.097 1.07 1.043 1.017 0.991 0.966 0.942 0.918 0.895 0.872 0.85 0.829 0.808 0.788 0.768 0.749 0.73 0.711 0.693 0.676 0.659 0.642 0.626 0.61 0.595 0.58

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.11" PeakHeight="100.538" Num="3" Error="3.031">
-15.589 6.607 -1.556
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.11" EndFrequency="10.9" PeakHeight="328.745" Num="5" zHalfNm="242.215" Error="3.241">
-171.9 -61.925 20.361 -7.746 2.035
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.032" Depth="0.124"/>
<TopsideChapman PeakHeight="328.745" PeakDensity="1474069.5" PeakScaleHeight="61.1" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
