<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-26 -057 09:10:00.000"
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: 70% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, Trace overlaps while constructing baseline</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) 09:10:00</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">
FF202605702260910009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.324" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.768" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="316.957" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.192" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="280.542" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="228.294" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.619" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="75.235" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.250" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="41.889" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="64.010" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.660" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="93">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 245.000 250.000 250.000 250.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.833 246.667 247.500 248.333 249.167 250.000 250.000 250.000 250.000 250.000 250.000 250.000 251.667 253.333 255.000 250.000 253.333 256.667 260.000 265.000 263.750 262.500 261.250 260.000 260.000 260.000 260.000 262.500 265.000 265.000 267.500 270.000 270.000 268.750 267.500 266.250 265.000 268.333 271.667 275.000 275.000 275.000 273.750 272.500 271.250 270.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 295.000 295.000 295.000 300.000 297.500 295.000 300.000 300.000 301.956 304.168 306.691 309.596 312.975 316.957 321.716 327.506 334.702 343.889 356.022 372.793 397.486 437.453 513.208
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 57 60 66 0 57 54 57 66 66 69 69 69 0 57 63 0 0 0 0 0 66 0 0 0 69 60 66 0 0 66 54 0 0 75 54 0 0 0 66 0 66 66 69 0 72 0 63 72 0 0 0 0 0 0 69 66 69 0 0 0 63 0 0 66 57 63 69 0 69 60 0 57 54 0 63 72 66 69 72 72 75 69 0 66 72 75 72 72 60 57 60 45
</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 -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 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="152">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.107 95.0 100.0 105.0 110.0 115.0 120.0 123.987 125.0 130.0 135.0 137.973 140.0 145.0 150.0 151.96 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 280.542 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.795 1.033 1.154 1.192 1.172 1.108 1.023 1.023 1.023 1.023 1.023 1.047 1.108 1.168 1.192 1.312 1.503 1.686 1.864 2.042 2.224 2.412 2.61 2.821 3.052 3.306 3.593 3.922 4.304 4.744 5.219 5.674 6.06 6.365 6.602 6.783 6.921 7.022 7.092 7.134 7.15 7.15 7.142 7.116 7.073 7.014 6.942 6.856 6.76 6.654 6.54 6.418 6.29 6.157 6.02 5.88 5.737 5.593 5.448 5.302 5.157 5.012 4.868 4.725 4.584 4.445 4.308 4.174 4.042 3.913 3.787 3.663 3.543 3.425 3.311 3.2 3.091 2.986 2.884 2.785 2.688 2.595 2.505 2.417 2.332 2.25 2.171 2.094 2.02 1.948 1.878 1.811 1.746 1.684 1.623 1.565 1.509 1.454 1.402 1.351 1.302 1.255 1.21 1.166 1.124 1.083 1.044 1.006 0.969 0.934 0.9 0.867 0.835 0.805 0.776 0.747 0.72 0.694 0.669 0.644 0.621 0.598 0.576 0.555 0.535 0.515 0.496 0.478 0.461 0.444 0.428 0.412 0.397 0.382 0.368 0.355 0.342 0.33 0.317 0.306 0.295 0.284 0.273 0.263 0.254 0.245 0.236 0.227 0.219 0.211 0.203

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.192" PeakHeight="110.0" Num="3" Error="0.0">
-27.254 8.837 -1.476
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.192" EndFrequency="7.15" PeakHeight="280.542" Num="5" zHalfNm="228.294" Error="3.171">
-128.675 5.714 -12.804 9.201 -2.018
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="41.96" Depth="0.169"/>
<TopsideChapman PeakHeight="280.542" PeakDensity="634274.2" PeakScaleHeight="41.889" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
