<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-07 -038 18:00:00.000"
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: 90% PACIFIC flags: 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" >
2026.02.07 (038) 18:00:00</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">
FF202603802071800009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.353" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.532" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" 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="9.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="575.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.069" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.208" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="389.817" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="267.072" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.469" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="154.115" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="46.302" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="84.809" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="206.940" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.170" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="107">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 270.000 270.000 275.000 280.000 283.333 286.667 290.000 295.000 300.000 303.750 307.500 311.250 315.000 315.000 320.000 325.000 335.000 330.000 335.000 340.000 345.000 350.000 350.000 355.000 355.000 355.000 360.000 365.000 367.500 370.000 375.000 375.000 375.000 380.000 385.000 385.000 385.000 390.000 390.000 390.000 395.000 400.000 402.500 405.000 407.500 410.000 410.000 415.000 420.000 422.500 425.000 425.000 430.000 430.000 435.000 440.000 440.000 445.000 445.000 450.000 455.000 455.000 460.000 460.000 465.000 465.000 470.000 475.000 480.000 480.000 490.000 495.000 495.000 500.000 500.000 505.000 510.000 515.000 520.000 525.000 525.000 530.000 535.000 535.000 540.000 545.000 545.000 545.000 550.000 555.000 555.000 560.000 560.000 565.000 570.000 575.000 575.000 580.000 585.000 590.000 600.000 605.000 610.000 618.879 629.208 641.374
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 45 48 45 48 0 0 45 54 54 0 0 0 54 45 51 54 45 54 54 0 0 51 57 54 57 54 60 57 0 60 51 51 54 63 57 60 57 60 57 48 63 66 0 0 0 63 60 63 51 0 51 60 60 57 60 54 60 54 63 63 54 57 63 63 63 63 60 63 63 63 66 63 60 57 60 57 60 63 63 54 60 57 48 60 51 45 54 57 60 51 57 54 57 57 57 54 54 51 54 51 51 51 48 51 48 45
</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 -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" >
89.534 90.0 95.0 100.0 105.0 110.0 112.911 115.0 115.823 118.734 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 389.817 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.063 2.656 2.969 3.069 2.947 2.947 2.947 3.069 3.101 3.224 3.346 3.468 3.592 3.717 3.845 3.975 4.108 4.243 4.381 4.52 4.661 4.803 4.947 5.09 5.234 5.377 5.52 5.662 5.803 5.943 6.081 6.219 6.355 6.49 6.623 6.756 6.887 7.017 7.147 7.275 7.403 7.53 7.656 7.782 7.908 8.034 8.159 8.284 8.41 8.536 8.662 8.789 8.916 9.043 9.172 9.3 9.429 9.556 9.681 9.798 9.9 9.974 10.0 10.0 9.996 9.986 9.97 9.947 9.919 9.886 9.847 9.803 9.754 9.701 9.644 9.583 9.517 9.449 9.377 9.302 9.224 9.144 9.061 8.975 8.888 8.799 8.708 8.615 8.521 8.426 8.33 8.233 8.134 8.036 7.936 7.836 7.736 7.636 7.535 7.435 7.334 7.233 7.133 7.033 6.933 6.834 6.735 6.636 6.539 6.441 6.345 6.249 6.154 6.059 5.966 5.873 5.781 5.69 5.6 5.511 5.423 5.336 5.249 5.164 5.08 4.997 4.915 4.833 4.753 4.674 4.596 4.519 4.443 4.368 4.294 4.222 4.15 4.079 4.009 3.941 3.873 3.806 3.741 3.676 3.612 3.55 3.488 3.427 3.367 3.308 3.25 3.193 3.137 3.082 3.028 2.975 2.922 2.87 2.82 2.77 2.72 2.672 2.625 2.578 2.532 2.487 2.443 2.399 2.356 2.314 2.273 2.232 2.192 2.152 2.114 2.076 2.039 2.002 1.966 1.931 1.896 1.862 1.828 1.795 1.763 1.731

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.069" PeakHeight="110.0" Num="3" Error="0.0">
-30.252 12.786 -3.0
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.069" EndFrequency="10.0" PeakHeight="389.817" Num="5" zHalfNm="267.072" Error="3.255">
-222.34 -72.915 33.739 -12.336 2.769
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.734" Depth="0.122"/>
<TopsideChapman PeakHeight="389.817" PeakDensity="1240694.8" PeakScaleHeight="84.809" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
