<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-26 -057 18:10:00.000"
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 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" >
2026.02.26 (057) 18:10:00</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">
FF202605702261810009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.336" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.882" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.950" 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="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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="540.000" 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="3.039" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.193" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="394.815" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="259.656" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.514" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="176.689" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="57.635" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="94.902" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="210.950" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.450" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="130">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
215.000 220.000 220.000 230.000 235.000 240.000 245.000 250.000 250.000 255.000 258.750 262.500 266.250 270.000 275.000 277.857 280.714 283.571 286.429 289.286 292.143 295.000 295.000 295.000 300.000 300.000 300.000 300.000 302.500 305.000 307.500 310.000 310.000 310.000 315.000 315.000 315.000 320.000 325.000 325.000 325.000 330.000 330.000 330.000 335.000 335.000 335.000 340.000 345.000 345.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 382.500 385.000 385.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 435.000 435.000 440.000 445.000 445.000 450.000 455.000 460.000 465.000 470.000 470.000 475.000 480.000 485.000 490.000 495.000 495.000 500.000 505.000 505.000 510.000 515.000 515.000 520.000 525.000 530.000 530.000 535.000 540.000 540.000 545.000 550.000 555.000 560.000 565.000 570.000 575.000 585.000 590.000 596.278 603.179 610.802 619.265 628.715 639.336 651.360 665.084 680.897 699.315
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 45 57 51 48 51 51 54 51 0 0 0 48 45 0 0 0 0 0 0 48 0 51 51 54 57 57 0 57 0 57 57 54 63 66 60 69 63 66 66 60 66 66 63 63 63 60 54 60 51 57 48 51 48 60 63 57 45 54 60 54 57 51 60 0 57 54 51 57 54 63 60 63 63 60 63 63 63 63 63 60 60 57 57 57 57 60 60 60 60 60 60 60 60 60 57 60 60 57 60 60 54 60 57 54 45 60 57 51 54 57 57 54 54 54 54 51 51 51 48 51 51 48 48 48 48 48 42 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 -0.390625 -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 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -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" >
89.539 90.0 95.0 100.0 105.0 110.0 113.042 115.0 116.083 119.125 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 394.815 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.043 2.63 2.94 3.039 2.917 2.917 2.917 3.039 3.062 3.19 3.32 3.453 3.589 3.73 3.877 4.029 4.187 4.35 4.52 4.693 4.87 5.05 5.231 5.411 5.591 5.769 5.945 6.118 6.288 6.455 6.619 6.78 6.937 7.092 7.244 7.394 7.541 7.686 7.829 7.97 8.109 8.246 8.383 8.517 8.651 8.783 8.915 9.045 9.174 9.302 9.429 9.555 9.679 9.802 9.923 10.041 10.155 10.264 10.366 10.459 10.537 10.599 10.637 10.65 10.65 10.647 10.638 10.624 10.605 10.581 10.552 10.518 10.48 10.438 10.392 10.342 10.288 10.231 10.171 10.107 10.041 9.972 9.9 9.826 9.749 9.671 9.59 9.508 9.424 9.338 9.251 9.163 9.073 8.983 8.891 8.799 8.706 8.612 8.518 8.423 8.328 8.233 8.137 8.041 7.945 7.85 7.754 7.658 7.563 7.468 7.373 7.278 7.184 7.09 6.997 6.904 6.812 6.72 6.629 6.539 6.449 6.36 6.272 6.184 6.097 6.011 5.926 5.841 5.758 5.675 5.593 5.512 5.431 5.352 5.273 5.195 5.119 5.043 4.968 4.893 4.82 4.748 4.676 4.605 4.536 4.467 4.399 4.332 4.265 4.2 4.135 4.072 4.009 3.947 3.886 3.826 3.766 3.708 3.65 3.593 3.537 3.481 3.427 3.373 3.32 3.268 3.216 3.166 3.116 3.066 3.018 2.97 2.923 2.876 2.831 2.786 2.741 2.698 2.655 2.612 2.571 2.53 2.489 2.449 2.41 2.371

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.039" PeakHeight="110.0" Num="3" Error="0.0">
-30.228 12.75 -2.983
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.039" EndFrequency="10.65" PeakHeight="394.815" Num="5" zHalfNm="259.656" Error="6.066">
-246.836 -46.553 28.039 -13.576 3.236
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.125" Depth="0.122"/>
<TopsideChapman PeakHeight="394.815" PeakDensity="1407227.0" PeakScaleHeight="94.902" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
