<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-25 -056 05:50:00.000"
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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, 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" >
2026.02.25 (056) 05:50:00</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">
FF202605602250550009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.242" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.420" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" 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="7.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="331.275" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="304.227" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="259.914" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.089" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="63.258" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.441" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="33.624" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="55.560" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.300" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="112">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 240.000 240.000 240.000 240.000 240.000 245.000 250.000 250.000 250.000 250.000 260.000 262.500 265.000 264.000 263.000 262.000 261.000 260.000 260.000 260.000 260.000 260.000 260.000 261.364 262.727 264.091 265.455 266.818 268.182 269.545 270.909 272.273 273.636 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 275.000 275.294 275.588 275.882 276.176 276.471 276.765 277.059 277.353 277.647 277.941 278.235 278.529 278.824 279.118 279.412 279.706 280.000 280.000 280.000 281.667 283.333 285.000 290.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 297.500 300.000 302.500 305.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 315.000 315.000 316.339 317.816 319.453 321.276 323.321 325.630 328.258 331.275 334.776 338.886 343.780 349.705 357.027 366.304 378.440 395.000 418.939 456.604
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 69 66 0 0 60 60 66 72 72 72 63 0 60 0 0 0 0 66 0 69 0 72 63 0 60 66 0 69 0 0 0 54 57 66 0 0 0 63 66 0 66 0 0 0 0 54 0 0 63 0 0 0 72 0 66 72 0 78 66 0 0 0 0 0 75 57 81 72 75 0 0 75 60 66 72 72 60 72 69 75 0 63 0 60 63 60 0 60 51 63 63 66 66 0 0 57 66 72 66 75 0 0 51 60 60 57 60 60 63 66 66
</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 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 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 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 1.171875 0.390625 1.171875 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 1.953125 1.171875 1.171875 0.390625 0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="138">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 140.333 145.0 150.0 155.0 160.0 165.0 170.0 170.667 175.0 180.0 185.0 190.0 195.0 200.0 201.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 304.227 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.341 0.323 0.297 0.26 0.205 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.222 0.247 0.273 0.298 0.324 0.349 0.354 0.437 0.584 0.788 1.055 1.394 1.82 2.347 2.981 3.696 4.436 5.14 5.773 6.322 6.787 7.174 7.49 7.739 7.927 8.057 8.131 8.15 8.15 8.127 8.074 7.992 7.886 7.759 7.613 7.451 7.277 7.093 6.9 6.702 6.499 6.293 6.087 5.88 5.674 5.47 5.269 5.071 4.877 4.688 4.503 4.323 4.148 3.978 3.814 3.655 3.501 3.353 3.21 3.073 2.941 2.813 2.691 2.574 2.461 2.353 2.249 2.15 2.055 1.963 1.876 1.792 1.712 1.636 1.563 1.493 1.426 1.362 1.3 1.242 1.186 1.132 1.081 1.033 0.986 0.941 0.899 0.858 0.819 0.782 0.747 0.713 0.681 0.65 0.62 0.592 0.566 0.54 0.515 0.492 0.47 0.448 0.428 0.409 0.39 0.372 0.356 0.339 0.324 0.309 0.295 0.282 0.269 0.257 0.245 0.234 0.223 0.213 0.204

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="8.15" PeakHeight="304.227" Num="5" zHalfNm="259.914" Error="2.227">
-116.581 21.623 -10.721 3.422 -0.97
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="91.0" Depth="0.154"/>
<TopsideChapman PeakHeight="304.227" PeakDensity="824100.5" PeakScaleHeight="33.624" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
