<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-07 -038 21:40:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.02.07 (038) 21:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603802072140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.665" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.584" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="325.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="325.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="491.243" 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="0.650" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="394.443" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="342.241" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.031" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="77.654" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="16.594" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="38.277" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="90.140" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.220" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="125">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
325.000 325.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 336.250 337.500 338.750 340.000 341.250 342.500 343.750 345.000 345.000 350.000 350.000 350.000 350.000 350.000 351.000 352.000 353.000 354.000 355.000 360.000 360.000 360.000 360.000 360.000 360.000 361.667 363.333 365.000 366.250 367.500 368.750 370.000 371.250 372.500 373.750 375.000 377.500 380.000 380.000 380.000 382.500 385.000 385.000 385.000 385.000 385.000 385.000 388.333 391.667 395.000 395.000 395.000 400.000 400.000 400.000 402.500 405.000 405.000 410.000 410.833 411.667 412.500 413.333 414.167 415.000 420.000 420.000 420.000 425.000 425.000 425.000 425.000 430.000 431.667 433.333 435.000 435.000 440.000 440.000 440.000 442.500 445.000 445.000 445.000 450.000 450.000 455.000 455.000 457.500 460.000 460.000 460.000 462.500 465.000 470.000 470.000 475.000 475.000 475.000 476.014 477.145 478.415 479.852 481.490 483.376 485.570 488.155 491.243 495.000 499.668 505.624 513.487
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 63 72 69 0 0 69 66 69 0 57 69 66 0 0 0 0 0 0 0 63 63 54 0 57 60 63 0 0 0 0 0 63 0 0 0 72 72 0 0 0 0 63 0 0 0 60 0 66 54 57 0 66 54 57 0 66 0 0 63 0 0 60 63 66 60 63 66 0 60 66 54 0 0 0 0 0 66 57 0 66 54 0 66 66 57 0 0 60 63 54 60 63 0 60 66 66 63 66 60 63 54 60 66 66 63 69 60 66 54 60 69 72 69 69 0 0 48 0 0 63 57 48 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="170">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.919 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.773 140.0 145.0 150.0 155.0 160.0 161.547 165.0 170.0 175.0 180.0 185.0 187.32 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 394.443 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.431 0.563 0.629 0.65 0.641 0.612 0.561 0.48 0.348 0.318 0.318 0.318 0.318 0.318 0.318 0.318 0.362 0.427 0.491 0.556 0.62 0.65 0.727 0.838 0.939 1.039 1.141 1.247 1.359 1.477 1.602 1.735 1.876 2.025 2.182 2.348 2.521 2.702 2.891 3.086 3.287 3.495 3.709 3.928 4.153 4.383 4.618 4.858 5.103 5.353 5.609 5.87 6.137 6.409 6.687 6.97 7.258 7.549 7.841 8.128 8.4 8.635 8.798 8.85 8.85 8.832 8.788 8.72 8.629 8.519 8.393 8.251 8.097 7.932 7.757 7.576 7.389 7.198 7.003 6.807 6.61 6.412 6.216 6.021 5.828 5.637 5.45 5.266 5.085 4.909 4.736 4.568 4.404 4.245 4.09 3.939 3.793 3.652 3.515 3.383 3.255 3.131 3.011 2.896 2.785 2.677 2.574 2.474 2.378 2.285 2.196 2.11 2.027 1.948 1.871 1.797 1.726 1.658 1.593 1.53 1.469 1.411 1.355 1.301 1.25 1.2 1.152 1.107 1.063 1.02 0.98 0.941 0.903 0.867 0.833 0.799 0.767 0.737 0.707 0.679 0.652 0.626 0.601 0.577 0.554 0.532 0.511 0.49 0.471 0.452 0.434 0.416 0.4 0.384 0.368 0.354 0.34 0.326 0.313 0.3 0.288 0.277 0.266 0.255 0.245 0.235 0.226 0.217 0.208

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.65" PeakHeight="110.0" Num="3" Error="0.0">
-24.198 5.787 -0.67
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.65" EndFrequency="8.85" PeakHeight="394.443" Num="5" zHalfNm="342.241" Error="3.517">
-175.444 -50.762 22.61 -6.478 2.951
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.32" Depth="0.332"/>
<TopsideChapman PeakHeight="394.443" PeakDensity="971743.2" PeakScaleHeight="38.277" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
