<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-06 -037 12:20:00.000"
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="1 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 0 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" >
2026.02.06 (037) 12:20:00</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">
FF202603702061220009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="9.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.468" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.704" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.850" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.160" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="98.892" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="97.540" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="8.757" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="390.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.060" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.203" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="395.529" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="216.989" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.076" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="235.410" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="55.402" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="125.546" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="261.910" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.740" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="98">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 225.000 228.750 232.500 236.250 240.000 240.000 245.000 250.000 255.000 260.000 265.000 270.000 270.000 275.000 280.000 285.000 285.000 290.000 290.000 295.000 297.500 300.000 300.000 302.000 304.000 306.000 308.000 310.000 315.000 317.500 320.000 320.000 325.000 325.000 330.000 330.000 332.500 335.000 335.000 340.000 340.000 340.000 345.000 345.000 350.000 355.000 355.000 360.000 360.000 365.000 365.000 370.000 370.000 380.000 380.000 385.000 390.000 390.000 400.000 405.000 410.000 410.000 415.000 425.000 430.000 435.000 440.000 450.000 460.000 470.000 480.000 490.000 505.000 515.000 525.000 538.333 551.667 565.000 570.000 585.000 590.000 600.000 605.000 615.000 620.000 630.000 640.000 650.000 660.000 670.000 680.000 695.000 710.000 725.000 750.000 775.000 815.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 0 0 0 45 54 54 51 54 54 54 54 51 54 54 48 57 54 57 51 0 0 0 0 0 0 0 60 60 0 51 60 57 63 54 60 0 54 60 57 60 63 63 63 66 60 63 57 63 63 66 66 66 63 66 63 54 57 57 54 60 60 57 57 54 57 60 57 57 63 63 63 63 63 57 51 48 54 57 57 57 54 54 57 57 57 57 57 57 54 54 51 51 51 51 48 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -1.953125 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 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 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="7">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.85 2.9 2.95 3.0 3.05 3.1 3.15
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
98.892 100.576 102.490 104.713 107.377 110.727 115.309
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 63 60 0 0 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -2.734375 0.390625 -1.953125 -0.390625 1.953125 -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" >
88.573 90.0 95.0 97.54 100.0 100.492 103.443 105.0 106.395 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 395.529 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 1.688 3.021 3.16 3.073 3.034 3.034 3.1 3.16 3.259 3.383 3.502 3.621 3.741 3.866 3.996 4.135 4.282 4.44 4.608 4.786 4.97 5.158 5.345 5.527 5.702 5.869 6.027 6.177 6.319 6.453 6.582 6.705 6.823 6.936 7.045 7.151 7.253 7.352 7.449 7.542 7.634 7.724 7.811 7.897 7.981 8.063 8.144 8.223 8.301 8.377 8.452 8.525 8.597 8.667 8.734 8.8 8.863 8.923 8.979 9.031 9.078 9.119 9.152 9.178 9.194 9.2 9.2 9.199 9.195 9.188 9.179 9.167 9.153 9.136 9.117 9.096 9.072 9.046 9.019 8.989 8.957 8.924 8.889 8.852 8.813 8.773 8.731 8.688 8.643 8.597 8.55 8.502 8.453 8.402 8.351 8.298 8.245 8.19 8.135 8.079 8.023 7.966 7.908 7.849 7.79 7.731 7.671 7.611 7.55 7.489 7.428 7.366 7.304 7.242 7.18 7.118 7.056 6.993 6.931 6.868 6.805 6.743 6.68 6.618 6.556 6.493 6.431 6.369 6.308 6.246 6.185 6.124 6.063 6.002 5.941 5.881 5.821 5.762 5.703 5.644 5.585 5.527 5.469 5.411 5.354 5.297 5.241 5.184 5.129 5.073 5.019 4.964 4.91 4.856 4.803 4.75 4.698 4.646 4.594 4.543 4.492 4.442 4.392 4.343 4.294 4.245 4.197 4.149 4.102 4.055 4.009 3.963 3.917 3.872 3.828 3.784 3.74 3.697 3.654 3.611 3.569 3.528 3.486 3.446 3.405 3.365 3.326 3.287

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.16" PeakHeight="97.54" Num="3" Error="1.217">
-13.278 5.646 -1.335
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.16" EndFrequency="9.2" PeakHeight="395.529" Num="5" zHalfNm="216.989" Error="13.006">
-284.974 -16.133 24.452 -18.912 6.433
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.855" Depth="0.126"/>
<TopsideChapman PeakHeight="395.529" PeakDensity="1050124.1" PeakScaleHeight="125.546" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
