<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-26 -057 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="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" >
2026.02.26 (057) 12:10:00</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">
FF202605702261210009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.695" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.109" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="230.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="230.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="456.581" 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="3.041" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.194" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="340.124" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="246.371" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.086" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="123.766" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="43.237" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="68.345" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="154.110" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.350" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="128">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 235.000 238.571 242.143 245.714 249.286 252.857 256.429 260.000 260.000 263.333 266.667 270.000 270.000 270.000 275.000 276.875 278.750 280.625 282.500 284.375 286.250 288.125 290.000 290.000 293.333 296.667 300.000 300.000 300.000 302.500 305.000 302.500 300.000 305.000 307.500 310.000 310.833 311.667 312.500 313.333 314.167 315.000 315.000 315.000 317.857 320.714 323.571 326.429 329.286 332.143 335.000 335.000 335.000 340.000 341.364 342.727 344.091 345.455 346.818 348.182 349.545 350.909 352.273 353.636 355.000 355.000 355.000 355.000 360.000 362.500 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 435.000 440.000 445.000 445.000 445.000 450.000 455.000 455.000 450.000 452.500 456.581 461.060 465.996 471.465 477.556 484.384 492.089 500.853 510.911 522.570 536.248 552.517 572.192
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 51 0 45 0 0 48 0 54 57 0 0 48 54 54 57 0 0 0 0 0 0 0 57 54 0 0 0 0 63 0 57 0 66 63 0 0 0 0 0 0 0 60 54 48 0 0 0 0 0 0 54 57 63 48 0 0 0 0 57 0 0 0 57 0 51 57 60 60 60 0 57 66 57 60 66 63 63 57 63 54 60 60 60 63 63 66 66 66 60 66 66 66 69 63 63 57 60 60 57 57 57 60 57 60 60 60 54 57 54 57 54 51 48 48 42 0 0 0 54 57 54 51 54 54 0 48 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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 -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 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -0.390625 -0.390625 -0.390625 1.953125 -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" >
89.538 90.0 95.0 100.0 105.0 110.0 113.033 115.0 116.067 119.1 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 340.124 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.044 2.632 2.942 3.041 2.919 2.919 2.919 3.041 3.069 3.225 3.379 3.533 3.688 3.845 4.004 4.167 4.333 4.503 4.676 4.852 5.032 5.215 5.401 5.59 5.781 5.975 6.171 6.369 6.568 6.769 6.97 7.173 7.377 7.581 7.785 7.99 8.195 8.4 8.605 8.809 9.013 9.214 9.414 9.611 9.804 9.99 10.169 10.335 10.486 10.614 10.713 10.777 10.8 10.8 10.795 10.779 10.752 10.716 10.671 10.617 10.555 10.486 10.409 10.326 10.236 10.141 10.041 9.936 9.826 9.713 9.596 9.476 9.354 9.228 9.101 8.972 8.841 8.709 8.576 8.442 8.308 8.173 8.038 7.903 7.769 7.634 7.5 7.367 7.235 7.103 6.973 6.843 6.715 6.588 6.462 6.338 6.215 6.094 5.974 5.855 5.739 5.624 5.51 5.399 5.289 5.18 5.074 4.969 4.866 4.764 4.665 4.567 4.471 4.376 4.283 4.192 4.103 4.015 3.929 3.845 3.762 3.681 3.601 3.523 3.447 3.372 3.298 3.226 3.156 3.087 3.019 2.953 2.888 2.824 2.762 2.701 2.641 2.583 2.526 2.47 2.415 2.362 2.309 2.258 2.208 2.158 2.11 2.063 2.017 1.972 1.928 1.885 1.843 1.802 1.761 1.722 1.683 1.646 1.609 1.573 1.537 1.503 1.469 1.436 1.404 1.372 1.342 1.311 1.282 1.253 1.225 1.197 1.17 1.144 1.118 1.093 1.069 1.044 1.021 0.998 0.975 0.953 0.932 0.911 0.89 0.87

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.041" PeakHeight="110.0" Num="3" Error="0.0">
-30.229 12.752 -2.985
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.041" EndFrequency="10.8" PeakHeight="340.124" Num="5" zHalfNm="246.371" Error="2.695">
-187.616 -44.367 13.459 -3.558 1.058
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.1" Depth="0.122"/>
<TopsideChapman PeakHeight="340.124" PeakDensity="1447146.4" PeakScaleHeight="68.345" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
