<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-25 -056 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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x 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" >
2026.02.25 (056) 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">
FF202605602251210009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.694" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.879" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" 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="3.040" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.194" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="332.383" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="236.262" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.086" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="128.141" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="40.828" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="70.958" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="151.300" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.550" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="121">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 225.000 230.000 230.000 234.286 238.571 242.857 247.143 251.429 255.714 260.000 265.000 270.000 275.000 275.000 275.000 277.727 280.455 283.182 285.909 288.636 291.364 294.091 296.818 299.545 302.273 305.000 305.000 305.000 305.000 305.000 305.000 305.000 310.000 305.000 307.500 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.833 311.667 312.500 313.333 314.167 315.000 315.000 316.667 318.333 320.000 322.500 325.000 330.000 330.000 331.429 332.857 334.286 335.714 337.143 338.571 340.000 340.000 340.000 345.000 345.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 365.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 390.000 390.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 420.000 420.000 425.000 425.000 430.000 435.000 435.000 440.000 445.000 445.000 450.000 450.000 455.000 460.000 465.000 465.000 475.000 480.000 485.000 493.587 504.031 517.008 533.567 555.426 585.619
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 51 54 60 0 0 0 0 0 0 51 51 0 45 54 54 0 54 0 0 0 0 0 0 0 0 0 60 57 0 57 60 57 54 51 0 60 54 63 66 69 69 69 63 57 54 0 0 0 0 0 69 60 0 0 60 0 63 57 57 0 0 48 0 0 0 57 63 66 63 66 63 66 60 66 63 63 66 69 63 66 60 66 63 66 66 60 66 66 60 66 63 66 66 66 66 60 66 63 66 63 57 63 60 51 60 57 60 60 57 57 57 60 57 54 57 57 54 54 51 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
2.734375 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.953125 -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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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" >
89.539 90.0 95.0 100.0 105.0 110.0 113.039 115.0 116.078 119.117 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 332.383 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.044 2.631 2.941 3.04 2.918 2.918 2.918 3.04 3.072 3.242 3.4 3.554 3.706 3.859 4.013 4.171 4.332 4.497 4.667 4.842 5.023 5.208 5.399 5.594 5.793 5.997 6.204 6.413 6.625 6.837 7.051 7.265 7.478 7.69 7.901 8.11 8.316 8.52 8.719 8.915 9.105 9.29 9.467 9.635 9.792 9.936 10.064 10.172 10.258 10.317 10.346 10.35 10.349 10.339 10.319 10.291 10.254 10.21 10.157 10.098 10.032 9.96 9.882 9.799 9.71 9.617 9.52 9.419 9.315 9.207 9.097 8.984 8.869 8.752 8.633 8.513 8.391 8.269 8.145 8.022 7.897 7.773 7.648 7.524 7.4 7.276 7.153 7.03 6.908 6.787 6.666 6.547 6.428 6.311 6.195 6.08 5.967 5.855 5.744 5.634 5.526 5.42 5.314 5.211 5.109 5.008 4.909 4.811 4.715 4.621 4.528 4.437 4.347 4.259 4.172 4.087 4.003 3.921 3.84 3.761 3.683 3.606 3.531 3.458 3.386 3.315 3.245 3.177 3.11 3.045 2.981 2.918 2.856 2.796 2.736 2.678 2.621 2.566 2.511 2.457 2.405 2.354 2.303 2.254 2.206 2.159 2.112 2.067 2.023 1.979 1.937 1.895 1.854 1.814 1.775 1.737 1.7 1.663 1.627 1.592 1.558 1.524 1.491 1.459 1.427 1.396 1.366 1.337 1.308 1.279 1.252 1.224 1.198 1.172 1.147 1.122 1.097 1.074 1.05 1.027 1.005 0.983 0.962 0.941 0.921 0.901

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.04" PeakHeight="110.0" Num="3" Error="0.0">
-30.228 12.751 -2.984
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.04" EndFrequency="10.35" PeakHeight="332.383" Num="5" zHalfNm="236.262" Error="4.692">
-187.564 -32.74 7.737 -2.262 1.563
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.117" Depth="0.122"/>
<TopsideChapman PeakHeight="332.383" PeakDensity="1329063.2" PeakScaleHeight="70.958" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
