<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-05 -036 09:40:00.000"
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 1 0 0 0 0 0 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, Unidentified traces above foF2, 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" >
2026.02.05 (036) 09:40:00</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">
FF202603602050940009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="7.006" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="6.023" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.421" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.945" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="313.333" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.006" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="1.782" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="279.689" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="239.151" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="218.945" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.550" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="79.360" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="40.056" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="12.592" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="48.660" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="66.770" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.580" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.190" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="20">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 325.000 305.000 305.000 305.000 310.000 310.000 310.000 310.476 310.952 311.429 311.905 312.381 312.857 313.333 380.000 383.624 390.505 408.624 587.980
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 57 66 72 72 75 72 63 63 0 0 0 0 0 0 57 57 69 63 48
</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 1.171875 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="61">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 255.000 255.000 255.000 255.000 250.000 255.000 265.000 255.000 260.000 260.000 258.750 257.500 256.250 255.000 255.000 260.000 260.000 257.500 255.000 255.000 255.000 255.000 255.000 256.667 258.333 260.000 275.000 270.000 270.000 270.000 275.000 275.000 270.000 270.000 275.000 277.500 280.000 280.000 280.000 285.000 286.250 287.500 288.750 290.000 292.500 295.000 295.000 295.000 305.000 305.000 305.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 0 60 0 0 60 0 66 63 69 57 69 66 72 60 48 66 60 54 0 60 0 60 60 66 72 0 63 0 0 0 54 48 0 0 60 66 0 57 0 63 69 66 66 0 63 66 69 0 0 0 0 60 0 63 69 63 60 60 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 2.734375 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="171">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.828 90.0 95.0 100.0 105.0 110.0 115.0 119.456 120.0 125.0 128.911 130.0 135.0 138.367 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 239.151 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 279.689 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.215 1.193 1.543 1.725 1.782 1.744 1.645 1.645 1.645 1.645 1.661 1.733 1.782 1.834 1.97 2.094 2.215 2.338 2.467 2.605 2.753 2.917 3.098 3.301 3.53 3.786 4.069 4.375 4.695 5.023 5.35 5.664 5.928 6.023 6.093 6.45 6.712 6.824 6.894 6.944 6.979 7.0 7.006 7.006 6.998 6.977 6.943 6.897 6.841 6.776 6.701 6.619 6.53 6.434 6.333 6.228 6.118 6.005 5.889 5.771 5.651 5.529 5.407 5.284 5.161 5.038 4.916 4.795 4.674 4.555 4.436 4.32 4.205 4.092 3.98 3.871 3.763 3.658 3.555 3.454 3.355 3.258 3.164 3.072 2.982 2.894 2.808 2.725 2.644 2.564 2.487 2.412 2.34 2.269 2.2 2.133 2.068 2.004 1.943 1.883 1.825 1.769 1.714 1.661 1.61 1.56 1.511 1.465 1.419 1.375 1.332 1.29 1.25 1.211 1.173 1.136 1.101 1.066 1.033 1.001 0.969 0.939 0.909 0.881 0.853 0.826 0.8 0.775 0.751 0.727 0.704 0.682 0.661 0.64 0.62 0.6 0.581 0.563 0.545 0.528 0.511 0.495 0.479 0.464 0.45 0.436 0.422 0.408 0.396 0.383 0.371 0.359 0.348 0.337 0.326 0.316 0.306 0.296 0.287 0.278 0.269 0.261 0.252 0.244 0.237 0.229 0.222 0.215 0.208 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.782" PeakHeight="110.0" Num="3" Error="0.0">
-28.702 10.632 -2.102
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="1.782" EndFrequency="6.023" PeakHeight="239.151" Num="5" Error="0.0">
-70.595 -32.595 1.295 -0.445 1.556
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="6.023" EndFrequency="7.006" PeakHeight="279.689" Num="5" zHalfNm="218.945" Error="2.423">
-50.06 11.242 -1.057 -1.394 0.731
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="28.367" Depth="0.137"/>
<TopsideChapman PeakHeight="279.689" PeakDensity="608983.06" PeakScaleHeight="48.66" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
