<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-02 -033 19:00:00.000"
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: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.02.02 (033) 19:00:00</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">
FF202603302021900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="11.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.370" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.776" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.300" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="270.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="270.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="115.000" Name="h`Es" 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="10.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="545.000" 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="2.768" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="415.031" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="307.182" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.597" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.300" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="144.053" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="55.253" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="78.695" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="188.100" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.170" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="138">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 275.000 278.333 281.667 285.000 288.333 291.667 295.000 298.333 301.667 305.000 305.000 310.000 315.000 320.000 325.000 325.000 325.000 330.000 334.167 338.333 342.500 346.667 350.833 355.000 355.000 355.000 357.500 360.000 365.000 367.222 369.444 371.667 373.889 376.111 378.333 380.556 382.778 385.000 385.000 390.000 390.000 395.000 395.000 397.000 399.000 401.000 403.000 405.000 405.000 405.000 410.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 425.000 426.667 428.333 430.000 430.000 435.000 435.000 440.000 442.500 445.000 445.000 445.000 450.000 455.000 455.000 455.000 460.000 460.000 460.000 465.000 467.500 470.000 473.333 476.667 480.000 480.000 480.000 485.000 485.000 490.000 490.000 490.000 490.000 495.000 495.000 496.667 498.333 500.000 505.000 505.000 505.000 510.000 511.250 512.500 513.750 515.000 515.000 520.000 520.000 520.000 525.000 520.000 525.000 530.000 530.000 535.000 540.000 540.000 545.000 545.000 545.000 545.000 555.000 560.000 560.000 565.000 570.000 575.000 580.000 585.000 590.000 597.500 605.000 614.306 625.274 638.393 654.365 674.234
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 0 48 0 0 0 60 0 0 54 51 54 0 57 57 0 0 57 0 0 0 0 0 51 51 57 0 51 51 0 54 0 48 0 57 0 0 57 57 60 60 57 57 0 0 0 0 63 63 60 0 54 60 63 63 60 60 60 57 63 0 0 57 0 60 57 54 48 54 63 60 0 48 54 60 60 54 57 57 0 57 0 0 48 51 60 51 60 51 54 57 54 57 54 0 0 54 54 54 57 48 0 0 0 54 54 48 57 57 51 54 45 51 48 51 45 51 45 48 45 0 48 48 48 48 51 51 48 48 51 0 45 45 42 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 1.171875 -0.390625 -0.390625 -1.171875 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 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 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 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 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 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 2.734375 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="21">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
125.000 122.500 120.000 119.375 118.750 118.125 117.500 116.875 116.250 115.625 115.000 115.000 115.000 115.000 115.000 115.000 120.000 120.000 117.500 115.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 51 0 0 0 0 0 54 0 57 0 57 0 57 51 48 48 0 51 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 -1.171875 0.390625 -0.390625 -0.390625 -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" >
89.586 90.0 95.0 100.0 105.0 110.0 114.283 115.0 118.566 120.0 122.849 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 415.031 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.86 2.396 2.678 2.768 2.646 2.646 2.646 2.687 2.768 2.819 2.938 3.058 3.179 3.302 3.425 3.55 3.677 3.804 3.934 4.064 4.196 4.329 4.463 4.599 4.736 4.874 5.014 5.155 5.297 5.44 5.585 5.731 5.878 6.026 6.176 6.327 6.48 6.634 6.789 6.946 7.104 7.264 7.425 7.588 7.752 7.917 8.085 8.254 8.424 8.596 8.77 8.945 9.122 9.299 9.478 9.658 9.838 10.017 10.195 10.371 10.543 10.708 10.864 11.004 11.125 11.219 11.279 11.3 11.3 11.296 11.283 11.262 11.233 11.196 11.153 11.103 11.046 10.984 10.915 10.842 10.763 10.68 10.592 10.501 10.405 10.306 10.204 10.1 9.992 9.882 9.77 9.656 9.541 9.424 9.305 9.186 9.065 8.944 8.823 8.701 8.578 8.456 8.333 8.21 8.088 7.966 7.845 7.724 7.603 7.483 7.364 7.246 7.129 7.012 6.897 6.783 6.669 6.557 6.446 6.336 6.228 6.121 6.014 5.91 5.806 5.704 5.603 5.504 5.406 5.309 5.214 5.12 5.027 4.936 4.846 4.757 4.67 4.584 4.5 4.417 4.335 4.254 4.175 4.097 4.021 3.946 3.871 3.799 3.727 3.657 3.588 3.52 3.453 3.388 3.323 3.26 3.198 3.137 3.077 3.018 2.96 2.904 2.848 2.793 2.74 2.687 2.635 2.584 2.534 2.486 2.438 2.39 2.344 2.299 2.254 2.211 2.168 2.126 2.084 2.044 2.004 1.965 1.927 1.89 1.853 1.817

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.768" PeakHeight="110.0" Num="3" Error="0.0">
-29.988 12.401 -2.827
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.768" EndFrequency="11.3" PeakHeight="415.031" Num="5" zHalfNm="307.182" Error="2.432">
-238.738 -72.915 23.046 -4.076 0.501
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.849" Depth="0.122"/>
<TopsideChapman PeakHeight="415.031" PeakDensity="1584243.1" PeakScaleHeight="78.695" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
