<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-22 -053 09:00:00.000"
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 F2x 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" >
2026.02.22 (053) 09:00:00</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">
FF202605302220900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="4.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.130" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="15.023" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" 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="4.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="332.330" 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="0.967" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="299.472" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="234.852" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.294" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="92.035" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.119" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="50.450" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="87.250" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.790" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="47">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.5 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 265.000 266.250 267.500 268.750 270.000 271.250 272.500 273.750 275.000 276.250 277.500 278.750 280.000 280.000 280.000 280.000 285.000 285.000 290.000 290.000 292.500 295.000 295.000 295.000 295.000 300.000 300.000 305.000 306.837 308.864 311.114 313.625 316.445 319.635 323.272 327.459 332.330 338.066 344.923 353.263 363.625 376.847 394.304 418.414 453.882 511.201
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 66 0 0 0 0 0 0 0 0 0 0 0 60 66 69 72 63 69 57 60 0 54 63 69 69 66 66 63 63 63 63 0 72 69 72 72 69 69 69 66 63 66 66 60 63 51
</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 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 1.953125 1.953125 1.953125 1.953125 2.734375 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="165">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.308 95.0 100.0 105.0 110.0 115.0 120.0 125.0 127.73 130.0 135.0 140.0 145.0 145.46 150.0 155.0 160.0 163.19 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 299.472 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.644 0.838 0.936 0.967 0.951 0.901 0.811 0.741 0.741 0.741 0.741 0.741 0.741 0.799 0.863 0.926 0.967 1.005 1.127 1.267 1.415 1.566 1.719 1.875 2.035 2.202 2.376 2.561 2.756 2.963 3.179 3.401 3.62 3.828 4.017 4.184 4.328 4.449 4.549 4.631 4.694 4.742 4.776 4.795 4.8 4.8 4.795 4.78 4.758 4.729 4.693 4.65 4.602 4.549 4.491 4.429 4.364 4.295 4.224 4.15 4.074 3.997 3.918 3.838 3.758 3.677 3.595 3.514 3.433 3.352 3.272 3.193 3.114 3.036 2.959 2.883 2.808 2.734 2.662 2.591 2.521 2.452 2.385 2.319 2.255 2.192 2.13 2.07 2.012 1.954 1.898 1.844 1.791 1.739 1.689 1.639 1.592 1.545 1.5 1.456 1.413 1.371 1.33 1.291 1.253 1.215 1.179 1.144 1.11 1.077 1.044 1.013 0.983 0.953 0.924 0.897 0.87 0.843 0.818 0.793 0.769 0.746 0.723 0.702 0.68 0.66 0.64 0.62 0.602 0.583 0.566 0.548 0.532 0.516 0.5 0.485 0.47 0.456 0.442 0.429 0.415 0.403 0.391 0.379 0.367 0.356 0.345 0.335 0.324 0.315 0.305 0.296 0.287 0.278 0.27 0.261 0.253 0.246 0.238 0.231 0.224 0.217 0.21 0.204

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.967" PeakHeight="110.0" Num="3" Error="0.0">
-26.355 7.842 -1.179
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.967" EndFrequency="4.8" PeakHeight="299.472" Num="5" zHalfNm="234.852" Error="2.659">
-142.186 10.884 -8.41 5.232 -1.802
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="53.19" Depth="0.226"/>
<TopsideChapman PeakHeight="299.472" PeakDensity="285856.1" PeakScaleHeight="50.45" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
