<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-26 -057 14:30:00.000"
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="1 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, 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" >
2026.02.26 (057) 14:30:00</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">
FF202605702261430009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="11.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.648" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.395" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="3.100" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.510" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="96.174" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="95.474" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="5.332" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="455.000" 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="3.386" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.358" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="331.784" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="238.892" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.377" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="117.622" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.801" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="67.752" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="168.500" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.080" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="111">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 310.000 310.000 310.000 315.000 315.000 316.364 317.727 319.091 320.455 321.818 323.182 324.545 325.909 327.273 328.636 330.000 330.000 330.000 330.000 331.667 333.333 335.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 345.000 346.429 347.857 349.286 350.714 352.143 353.571 355.000 355.000 357.500 360.000 360.000 360.000 362.500 365.000 365.000 365.000 370.000 370.000 375.000 375.000 377.500 380.000 380.000 382.500 385.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 397.500 400.000 400.000 400.000 400.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 455.000 455.000 460.000 465.000 470.000 470.000 475.000 480.000 485.000 485.000 490.000 495.000 500.000 505.000 512.037 520.456 530.708 543.464
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 57 57 54 57 54 0 0 0 0 0 0 0 0 0 0 0 0 51 51 0 0 57 60 63 63 60 57 63 0 63 57 51 60 0 0 0 0 51 0 54 57 0 54 57 60 0 57 60 57 60 60 54 57 0 54 57 0 54 57 60 54 57 45 51 54 45 51 51 0 0 0 51 57 54 57 54 60 60 60 60 60 63 57 60 54 60 54 60 54 57 54 57 57 57 54 51 57 54 51 51 51 51 51 48 48 0 48 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 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.953125 -0.390625 0.390625 -2.734375 1.953125 -1.953125 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="9">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
96.174 96.848 97.592 98.425 99.371 100.471 101.789 103.449 105.721
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 0 0 57 57 54 51 57
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -2.734375 1.953125 -0.390625 -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" >
90.0 95.0 95.474 97.041 98.608 100.0 100.175 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 331.784 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 3.496 3.51 3.383 3.383 3.496 3.51 3.708 3.879 4.034 4.181 4.323 4.462 4.6 4.737 4.874 5.013 5.152 5.293 5.436 5.581 5.728 5.878 6.03 6.185 6.343 6.503 6.666 6.833 7.002 7.174 7.348 7.526 7.707 7.89 8.075 8.264 8.455 8.648 8.843 9.041 9.24 9.441 9.642 9.844 10.046 10.245 10.439 10.623 10.793 10.937 11.043 11.096 11.1 11.098 11.084 11.06 11.026 10.982 10.929 10.867 10.797 10.719 10.634 10.543 10.446 10.343 10.235 10.123 10.006 9.885 9.762 9.635 9.505 9.374 9.24 9.105 8.968 8.83 8.692 8.552 8.413 8.273 8.133 7.993 7.854 7.715 7.577 7.44 7.303 7.168 7.034 6.901 6.769 6.639 6.51 6.382 6.257 6.132 6.01 5.889 5.77 5.652 5.537 5.423 5.311 5.201 5.092 4.986 4.881 4.778 4.677 4.577 4.48 4.384 4.29 4.197 4.107 4.018 3.931 3.845 3.762 3.68 3.599 3.52 3.443 3.367 3.293 3.22 3.149 3.08 3.011 2.945 2.879 2.815 2.753 2.691 2.631 2.572 2.515 2.459 2.404 2.35 2.297 2.245 2.195 2.146 2.097 2.05 2.004 1.959 1.915 1.872 1.829 1.788 1.748 1.708 1.67 1.632 1.595 1.559 1.523 1.489 1.455 1.422 1.39 1.359 1.328 1.298 1.268 1.239 1.211 1.184 1.157 1.131 1.105 1.08 1.055 1.031 1.008 0.985 0.963 0.941 0.919 0.898 0.878 0.858 0.838

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.51" PeakHeight="95.474" Num="3" Error="0.672">
-8.153 3.539 -0.86
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.51" EndFrequency="11.1" PeakHeight="331.784" Num="5" zHalfNm="238.892" Error="5.146">
-183.334 -65.028 16.087 -0.811 1.477
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.701" Depth="0.127"/>
<TopsideChapman PeakHeight="331.784" PeakDensity="1528660.0" PeakScaleHeight="67.752" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
