<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-24 -055 16:50:00.000"
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 F2o 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" >
2026.02.24 (055) 16:50:00</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">
FF202605502241650009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.437" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.733" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="330.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="330.000" 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="8.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="445.000" 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="3.294" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.316" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="372.091" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="244.770" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.046" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="164.608" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.248" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="91.129" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="204.100" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.410" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="90">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
330.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 341.667 343.333 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 362.500 365.000 365.000 365.000 367.500 370.000 372.500 375.000 377.500 380.000 382.500 385.000 387.500 390.000 392.500 395.000 397.500 400.000 405.000 405.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 435.000 440.000 445.000 445.000 450.000 455.000 460.000 465.000 470.000 475.000 480.000 485.000 490.000 495.000 500.000 505.000 510.000 515.000 520.000 525.000 530.000 535.000 540.000 545.000 550.000 555.768 562.065 568.968 576.568 584.976 594.329 604.795 616.585 629.968 645.290 663.006
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 0 0 51 48 54 54 0 0 57 60 63 54 0 60 66 66 60 57 60 66 63 63 63 63 0 63 57 54 0 0 0 0 0 0 0 60 0 0 45 0 0 54 45 57 57 48 54 51 60 57 51 0 57 60 57 60 60 60 54 57 63 66 63 63 63 63 60 60 57 51 54 51 51 51 54 57 54 48 42 42 45 48 45 45 48 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 -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 -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 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 -1.953125 -1.953125 2.734375
</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" >
89.498 90.0 95.0 100.0 105.0 110.0 111.946 113.891 115.0 115.837 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 372.091 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.216 2.851 3.187 3.294 3.172 3.172 3.242 3.294 3.448 3.607 3.753 3.893 4.031 4.167 4.304 4.443 4.583 4.725 4.87 5.018 5.167 5.319 5.472 5.628 5.784 5.941 6.099 6.256 6.413 6.57 6.725 6.879 7.032 7.184 7.334 7.483 7.63 7.775 7.919 8.061 8.202 8.341 8.478 8.614 8.749 8.882 9.012 9.141 9.268 9.391 9.511 9.627 9.737 9.84 9.934 10.015 10.08 10.125 10.148 10.15 10.149 10.143 10.131 10.113 10.091 10.063 10.031 9.994 9.952 9.907 9.857 9.804 9.747 9.687 9.623 9.557 9.488 9.416 9.342 9.265 9.186 9.106 9.023 8.939 8.853 8.766 8.678 8.588 8.498 8.406 8.314 8.221 8.127 8.033 7.939 7.844 7.749 7.654 7.559 7.464 7.369 7.274 7.18 7.085 6.991 6.898 6.804 6.712 6.619 6.528 6.436 6.346 6.256 6.167 6.078 5.99 5.903 5.817 5.731 5.647 5.563 5.48 5.398 5.316 5.236 5.156 5.078 5.0 4.923 4.847 4.772 4.698 4.625 4.553 4.481 4.411 4.342 4.273 4.205 4.138 4.073 4.008 3.944 3.88 3.818 3.757 3.696 3.636 3.578 3.52 3.462 3.406 3.351 3.296 3.242 3.189 3.137 3.086 3.035 2.985 2.936 2.888 2.84 2.793 2.747 2.701 2.657 2.613 2.569 2.527 2.485 2.443 2.403 2.363 2.323 2.285 2.247 2.209 2.172 2.136 2.1 2.065 2.03 1.996 1.963 1.93

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.294" PeakHeight="110.0" Num="3" Error="0.0">
-30.43 13.047 -3.119
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.294" EndFrequency="10.15" PeakHeight="372.091" Num="5" zHalfNm="244.77" Error="5.949">
-226.539 -45.715 19.912 -6.908 2.996
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.837" Depth="0.122"/>
<TopsideChapman PeakHeight="372.091" PeakDensity="1278194.8" PeakScaleHeight="91.129" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
