<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-28 -059 12:30:00.000"
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="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 F2o 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" >
2026.02.28 (059) 12:30:00</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">
FF202605902281230009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="11.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.674" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.214" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" 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="10.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="471.581" 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="3.124" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.235" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="337.792" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="245.523" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.069" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="120.477" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="46.069" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="66.129" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="156.510" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.220" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="120">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 275.000 276.667 278.333 280.000 281.667 283.333 285.000 286.667 288.333 290.000 290.000 290.000 290.000 290.000 290.000 290.000 292.500 295.000 300.000 300.000 300.000 301.786 303.571 305.357 307.143 308.929 310.714 312.500 314.286 316.071 317.857 319.643 321.429 323.214 325.000 325.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 340.000 340.000 345.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 425.000 425.000 425.000 435.000 435.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 450.000 455.000 455.000 460.000 460.000 465.000 468.119 471.581 475.448 479.795 484.717 490.335 496.810 504.352 513.251 523.908 536.900 553.091
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 0 0 0 0 0 0 57 0 54 60 60 60 60 54 51 0 60 60 60 60 0 0 0 57 0 0 0 0 0 0 0 48 0 57 57 57 54 0 63 63 60 66 60 63 54 60 60 54 63 63 57 63 63 63 63 60 63 54 60 63 57 63 57 63 57 63 57 63 66 63 66 57 63 54 60 66 66 63 66 66 63 63 60 60 63 57 60 60 60 60 51 54 57 60 54 57 45 51 42 0 51 48 54 48 51 51 48 45 42 0 0 0 0 45 42 0 45 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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 -0.390625 -0.390625 0.390625 -2.734375 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.953125 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -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" >
89.525 90.0 95.0 100.0 105.0 110.0 112.672 115.0 115.345 118.017 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 337.792 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.101 2.704 3.022 3.124 3.002 3.002 3.002 3.124 3.211 3.409 3.594 3.772 3.947 4.122 4.297 4.474 4.653 4.834 5.017 5.204 5.392 5.583 5.775 5.97 6.166 6.363 6.562 6.761 6.961 7.162 7.363 7.565 7.767 7.969 8.172 8.374 8.577 8.781 8.984 9.188 9.392 9.596 9.8 10.003 10.205 10.404 10.598 10.785 10.958 11.108 11.224 11.29 11.3 11.299 11.287 11.264 11.229 11.184 11.13 11.065 10.992 10.912 10.823 10.728 10.626 10.518 10.405 10.287 10.165 10.038 9.909 9.776 9.64 9.502 9.362 9.22 9.077 8.933 8.788 8.643 8.497 8.351 8.205 8.06 7.915 7.77 7.627 7.484 7.343 7.202 7.063 6.926 6.789 6.654 6.521 6.39 6.26 6.132 6.006 5.881 5.759 5.638 5.519 5.402 5.288 5.175 5.064 4.954 4.847 4.742 4.639 4.537 4.438 4.34 4.245 4.151 4.059 3.968 3.88 3.793 3.709 3.625 3.544 3.464 3.386 3.31 3.235 3.162 3.09 3.02 2.951 2.884 2.818 2.754 2.691 2.629 2.569 2.51 2.453 2.396 2.341 2.287 2.235 2.183 2.133 2.084 2.036 1.989 1.943 1.898 1.854 1.811 1.769 1.728 1.688 1.649 1.611 1.574 1.537 1.502 1.467 1.433 1.399 1.367 1.335 1.304 1.274 1.244 1.215 1.187 1.159 1.132 1.106 1.08 1.055 1.031 1.007 0.983 0.96 0.938 0.916 0.895 0.874 0.854 0.834 0.814

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.124" PeakHeight="110.0" Num="3" Error="0.0">
-30.297 12.852 -3.03
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.124" EndFrequency="11.3" PeakHeight="337.792" Num="5" zHalfNm="245.523" Error="2.192">
-184.548 -52.053 20.141 -5.036 1.721
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.017" Depth="0.122"/>
<TopsideChapman PeakHeight="337.792" PeakDensity="1584243.1" PeakScaleHeight="66.129" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
