<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-12 -043 17:40:00.000"
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 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" >
2026.02.12 (043) 17:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.14" 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">
FF202604302121740009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="10.125" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="4.673" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.283" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.058" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="185.000" 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="9.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="560.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.025" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.148" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.250" 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="4.246" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="402.871" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="160.670" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="254.555" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.366" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="181.032" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="47.642" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="57.556" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="105.492" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="229.950" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.500" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="109">
<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 10.05 10.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 265.000 270.000 275.000 285.000 295.000 295.000 300.000 300.000 310.000 310.000 315.000 315.000 315.000 317.000 319.000 321.000 323.000 325.000 325.000 330.000 330.000 335.000 335.000 335.000 335.000 345.000 345.000 345.000 345.000 350.000 351.667 353.333 355.000 355.000 355.000 360.000 362.500 365.000 367.500 370.000 370.000 370.000 375.000 375.000 380.000 385.000 385.000 385.000 390.000 395.000 395.000 400.000 405.000 410.000 415.000 415.000 420.000 425.000 425.000 430.000 430.000 435.000 440.000 445.000 450.000 455.000 465.000 470.000 470.000 475.000 480.000 485.000 495.000 495.000 505.000 505.000 510.000 510.000 520.000 525.000 530.000 530.000 535.000 540.000 545.000 545.000 550.000 555.000 560.000 560.000 565.000 570.000 575.000 580.000 590.000 595.000 601.278 608.179 615.802 624.265 633.715 644.336 656.360 670.084 685.897 704.315 726.038 752.046
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 60 51 57 0 48 60 60 57 60 63 60 57 51 0 0 54 0 0 0 0 0 0 63 63 57 51 60 60 60 63 0 0 0 54 45 57 0 0 0 51 57 51 60 54 69 63 66 66 66 69 69 69 69 72 69 66 69 66 66 63 60 66 66 66 66 66 60 63 72 72 75 72 54 66 54 60 60 60 60 57 57 60 60 60 54 57 54 0 54 54 57 57 57 54 51 54 51 54 54 51 51 51 51 48 51 0 0 0
</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 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 -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 -1.953125 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="9">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
185.000 195.000 210.000 220.000 235.000 235.000 240.000 247.500 255.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 63 60 54 51 54 51 0 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="189">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.521 90.0 95.0 100.0 105.0 110.0 112.568 115.0 115.137 117.705 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 160.67 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 402.871 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.117 2.725 3.046 3.148 3.026 3.026 3.026 3.148 3.281 3.529 3.793 4.029 4.212 4.359 4.485 4.596 4.671 4.673 4.763 4.868 4.974 5.084 5.197 5.313 5.434 5.56 5.691 5.827 5.968 6.113 6.262 6.414 6.567 6.721 6.873 7.024 7.173 7.317 7.459 7.596 7.73 7.86 7.986 8.109 8.229 8.346 8.46 8.572 8.681 8.788 8.894 8.997 9.098 9.198 9.296 9.392 9.487 9.58 9.67 9.758 9.842 9.92 9.991 10.051 10.096 10.121 10.125 10.125 10.121 10.112 10.1 10.083 10.063 10.039 10.012 9.981 9.946 9.909 9.868 9.825 9.779 9.73 9.679 9.625 9.569 9.511 9.45 9.388 9.324 9.258 9.191 9.122 9.052 8.98 8.908 8.834 8.759 8.683 8.606 8.528 8.45 8.371 8.291 8.211 8.131 8.05 7.969 7.887 7.806 7.724 7.642 7.56 7.478 7.396 7.315 7.233 7.151 7.07 6.989 6.908 6.828 6.747 6.668 6.588 6.509 6.431 6.352 6.275 6.198 6.121 6.045 5.969 5.894 5.82 5.746 5.673 5.6 5.528 5.457 5.386 5.316 5.246 5.177 5.109 5.042 4.975 4.909 4.843 4.779 4.715 4.651 4.588 4.526 4.465 4.404 4.344 4.285 4.226 4.168 4.111 4.054 3.999 3.943 3.889 3.835 3.781 3.729 3.677 3.625 3.575 3.525 3.475 3.426 3.378 3.33 3.284 3.237 3.191 3.146 3.102 3.058 3.014 2.971 2.929 2.887 2.846 2.806

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.148" PeakHeight="110.0" Num="3" Error="0.0">
-30.316 12.88 -3.043
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.148" EndFrequency="4.673" PeakHeight="160.67" Num="5" Error="0.0">
-38.453 -7.481 4.615 -2.513 0.867
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="4.673" EndFrequency="10.125" PeakHeight="402.871" Num="5" zHalfNm="254.555" Error="5.77">
-206.632 -46.218 19.181 -11.317 2.785
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.705" Depth="0.122"/>
<TopsideChapman PeakHeight="402.871" PeakDensity="1271906.0" PeakScaleHeight="105.492" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
