<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-07 -038 14:40:00.000"
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" >
2026.02.07 (038) 14:40:00</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">
FF202603802071440009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="9.475" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="6.023" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.294" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.680" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="380.000" 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="7.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" 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="3.372" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.352" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="393.610" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="222.885" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="250.057" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.414" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="154.323" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="86.061" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="49.499" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="103.074" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="236.890" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.340" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="69">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
380.000 380.000 380.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 402.500 405.000 407.500 410.000 410.000 410.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 445.000 445.000 450.000 455.000 455.000 460.000 465.000 470.000 475.000 475.000 485.000 490.000 495.000 495.000 500.000 505.000 510.000 525.000 530.000 535.000 535.000 540.000 545.000 555.000 565.000 570.000 575.000 575.000 580.000 585.000 595.000 600.000 605.000 611.982 619.607 627.968 637.175 647.365 658.705 671.399 685.707 701.956 720.572
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 57 54 54 51 51 0 51 51 51 0 48 0 48 51 48 54 48 54 51 54 54 57 54 54 57 57 54 57 57 57 57 60 60 60 60 60 60 60 63 63 63 63 51 57 57 57 57 57 57 45 51 48 57 57 54 57 57 57 54 54 51 51 48 48 48 48 45 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 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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" >
4.95 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 260.000 270.000 277.500 285.000 292.500 300.000 305.357 310.714 316.071 321.429 326.786 332.143 337.500 342.857 348.214 353.571 358.929 364.286 369.643 375.000 375.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 48 48 0 0 45 0 0 0 0 0 0 0 45 0 0 0 51 0 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 0.390625 2.734375 1.953125 1.953125 -0.390625 -0.390625 -1.171875 -1.953125 1.171875 1.171875 -2.734375 -2.734375 0.390625 -0.390625 1.953125 -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" >
89.487 90.0 95.0 100.0 105.0 110.0 111.626 113.252 114.878 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 222.885 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 393.61 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.269 2.918 3.262 3.372 3.249 3.249 3.372 3.377 3.549 3.701 3.85 4.0 4.151 4.302 4.45 4.592 4.728 4.856 4.977 5.092 5.202 5.308 5.41 5.509 5.608 5.706 5.804 5.904 5.998 6.023 6.08 6.208 6.331 6.453 6.575 6.698 6.823 6.949 7.075 7.203 7.329 7.455 7.578 7.699 7.816 7.929 8.039 8.145 8.248 8.347 8.444 8.537 8.628 8.717 8.804 8.889 8.972 9.054 9.134 9.213 9.289 9.36 9.422 9.465 9.475 9.475 9.471 9.464 9.452 9.437 9.418 9.395 9.368 9.339 9.306 9.269 9.23 9.188 9.144 9.097 9.047 8.995 8.941 8.884 8.826 8.766 8.704 8.641 8.576 8.509 8.441 8.372 8.302 8.23 8.158 8.085 8.011 7.936 7.861 7.785 7.708 7.631 7.554 7.476 7.398 7.32 7.242 7.163 7.085 7.007 6.928 6.85 6.771 6.693 6.616 6.538 6.46 6.383 6.307 6.23 6.154 6.079 6.003 5.929 5.854 5.781 5.707 5.634 5.562 5.491 5.42 5.349 5.279 5.21 5.141 5.073 5.006 4.939 4.873 4.807 4.742 4.678 4.614 4.551 4.489 4.428 4.367 4.307 4.247 4.188 4.13 4.072 4.015 3.959 3.904 3.849 3.795 3.741 3.688 3.636 3.584 3.533 3.483 3.433 3.384 3.336 3.288 3.24 3.194 3.148 3.102 3.058 3.013 2.97 2.927 2.884 2.842 2.801 2.76 2.72 2.68 2.641 2.603 2.565 2.527 2.49 2.454

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.372" PeakHeight="110.0" Num="3" Error="0.0">
-30.487 13.132 -3.158
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.372" EndFrequency="6.023" PeakHeight="222.885" Num="5" Error="0.0">
-86.707 -32.331 15.301 -5.989 1.719
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="6.023" EndFrequency="9.475" PeakHeight="393.61" Num="5" zHalfNm="250.057" Error="4.072">
-140.268 -42.07 16.632 -6.938 1.919
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.878" Depth="0.123"/>
<TopsideChapman PeakHeight="393.61" PeakDensity="1113841.5" PeakScaleHeight="103.074" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
