<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-03 -034 13:00:00.000"
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 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 F2o 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" >
2026.02.03 (034) 13:00:00</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">
FF202603402031300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="9.875" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="5.473" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.395" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.593" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="205.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="440.000" 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="3.194" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.268" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="392.494" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="189.126" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="240.893" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.082" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="188.115" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="60.960" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="57.009" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="111.210" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="228.420" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.730" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="88">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 305.000 310.000 315.000 315.000 315.000 318.750 322.500 326.250 330.000 330.000 330.000 335.000 338.000 341.000 344.000 347.000 350.000 350.000 350.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 387.500 390.000 395.000 395.000 400.000 400.000 405.000 410.000 410.000 415.000 415.000 417.500 420.000 425.000 430.000 435.000 440.000 440.000 450.000 455.000 455.000 465.000 470.000 475.000 480.000 485.000 495.000 500.000 505.000 515.000 525.000 530.000 535.000 540.000 545.000 550.000 550.000 555.000 560.000 570.000 580.000 585.000 590.000 597.562 606.272 616.415 628.374 642.687 660.123 681.830 709.597 746.374 797.392
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 57 54 54 51 57 51 0 0 0 54 54 48 0 0 0 0 0 57 57 54 51 60 63 57 63 57 60 60 60 60 57 60 54 60 0 60 54 57 51 54 54 51 57 51 54 0 51 54 60 66 66 66 66 63 60 60 60 60 60 60 60 60 60 60 51 54 57 57 54 60 63 60 63 57 60 60 60 57 57 51 57 57 54 51 0 0 42
</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 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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="22">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
205.000 210.000 215.000 220.000 224.706 229.412 234.118 238.824 243.529 248.235 252.941 257.647 262.353 267.059 271.765 276.471 281.176 285.882 290.588 295.294 300.000 300.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 48 45 0 0 0 0 48 0 0 0 0 0 48 0 0 0 48 0 45 54
</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 -1.171875 -0.390625 -1.171875 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -1.953125 0.390625 0.390625 2.734375 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" >
89.514 90.0 95.0 100.0 105.0 110.0 112.371 114.743 115.0 117.114 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 189.126 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 392.494 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.148 2.764 3.09 3.194 3.072 3.072 3.085 3.194 3.318 3.513 3.711 3.918 4.124 4.317 4.49 4.646 4.786 4.917 5.041 5.161 5.281 5.402 5.473 5.501 5.651 5.795 5.936 6.076 6.217 6.361 6.506 6.654 6.804 6.956 7.107 7.257 7.406 7.551 7.693 7.83 7.963 8.092 8.216 8.335 8.451 8.562 8.67 8.774 8.874 8.971 9.065 9.156 9.244 9.329 9.41 9.487 9.56 9.629 9.692 9.747 9.795 9.833 9.86 9.873 9.875 9.875 9.871 9.863 9.852 9.837 9.819 9.798 9.773 9.746 9.715 9.682 9.646 9.607 9.566 9.522 9.476 9.428 9.378 9.326 9.272 9.216 9.158 9.099 9.038 8.976 8.913 8.848 8.782 8.715 8.647 8.579 8.509 8.438 8.367 8.295 8.222 8.149 8.075 8.001 7.927 7.852 7.777 7.701 7.626 7.55 7.475 7.399 7.323 7.247 7.171 7.096 7.02 6.945 6.87 6.795 6.72 6.646 6.572 6.498 6.424 6.351 6.278 6.206 6.134 6.063 5.992 5.921 5.851 5.781 5.712 5.644 5.575 5.508 5.441 5.374 5.308 5.243 5.178 5.114 5.05 4.987 4.925 4.863 4.802 4.741 4.681 4.621 4.562 4.504 4.446 4.389 4.333 4.277 4.221 4.167 4.113 4.059 4.006 3.954 3.902 3.851 3.8 3.75 3.701 3.652 3.604 3.556 3.509 3.462 3.416 3.37 3.326 3.281 3.237 3.194 3.151 3.109 3.067 3.026 2.985 2.945 2.905

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.194" PeakHeight="110.0" Num="3" Error="0.0">
-30.353 12.934 -3.067
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.194" EndFrequency="5.473" PeakHeight="189.126" Num="5" Error="0.0">
-58.234 -20.928 10.564 -4.748 1.334
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="5.473" EndFrequency="9.875" PeakHeight="392.494" Num="5" zHalfNm="240.893" Error="4.376">
-187.625 -23.132 11.405 -6.009 1.993
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.114" Depth="0.122"/>
<TopsideChapman PeakHeight="392.494" PeakDensity="1209871.2" PeakScaleHeight="111.21" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
