<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-07 -038 14:00:00.000"
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 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) 14:00:00</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">
FF202603802071400009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.287" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.841" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="365.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="365.000" 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="7.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="445.000" 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="3.329" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.332" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="416.527" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="253.660" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.257" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="209.995" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="56.045" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="115.883" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="253.430" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.510" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="75">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
365.000 365.000 370.000 370.000 370.000 375.000 375.000 377.500 380.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 400.000 400.000 403.750 407.500 411.250 415.000 415.000 420.000 420.000 425.000 425.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 455.000 460.000 465.000 465.000 470.000 475.000 490.000 495.000 495.000 500.000 510.000 515.000 525.000 530.000 540.000 545.000 555.000 560.000 570.000 580.000 580.000 590.000 595.000 600.000 610.000 615.000 620.000 630.000 635.000 645.000 650.000 660.000 670.000 680.000 692.338 706.387 722.528 741.267 763.286 789.528
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 57 54 0 51 54 51 0 54 51 54 51 0 54 51 57 51 57 54 0 48 0 51 57 54 60 57 60 57 51 57 54 57 60 60 60 57 54 57 57 60 48 54 60 60 63 60 60 60 60 57 57 54 54 48 54 57 57 54 54 54 51 48 51 45 48 48 48 51 51 51 51 48 45 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 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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" >
89.492 90.0 95.0 100.0 105.0 110.0 111.803 113.605 115.0 115.408 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 416.527 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.24 2.881 3.221 3.329 3.206 3.206 3.301 3.329 3.464 3.591 3.709 3.822 3.934 4.044 4.156 4.268 4.382 4.498 4.617 4.738 4.861 4.987 5.114 5.244 5.374 5.506 5.638 5.77 5.902 6.033 6.162 6.29 6.417 6.542 6.664 6.785 6.904 7.02 7.135 7.248 7.359 7.468 7.576 7.682 7.786 7.889 7.99 8.09 8.188 8.285 8.381 8.475 8.568 8.659 8.749 8.837 8.923 9.007 9.088 9.166 9.24 9.309 9.373 9.429 9.476 9.513 9.538 9.549 9.55 9.549 9.545 9.538 9.527 9.513 9.497 9.477 9.454 9.429 9.401 9.371 9.338 9.303 9.265 9.226 9.184 9.14 9.095 9.047 8.998 8.947 8.895 8.841 8.786 8.729 8.671 8.612 8.552 8.491 8.429 8.366 8.302 8.237 8.172 8.106 8.039 7.972 7.904 7.836 7.767 7.698 7.629 7.559 7.489 7.419 7.349 7.279 7.209 7.138 7.068 6.998 6.927 6.857 6.787 6.717 6.647 6.578 6.509 6.439 6.371 6.302 6.234 6.166 6.098 6.031 5.964 5.897 5.831 5.765 5.7 5.635 5.571 5.507 5.443 5.38 5.317 5.255 5.194 5.132 5.072 5.012 4.952 4.893 4.834 4.776 4.719 4.661 4.605 4.549 4.494 4.439 4.384 4.33 4.277 4.224 4.172 4.12 4.069 4.018 3.968 3.919 3.87 3.821 3.773 3.725 3.678 3.632 3.586 3.541 3.496 3.451 3.407 3.364 3.321 3.278 3.237 3.195

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.329" PeakHeight="110.0" Num="3" Error="0.0">
-30.457 13.086 -3.137
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.329" EndFrequency="9.55" PeakHeight="416.527" Num="5" zHalfNm="253.66" Error="7.449">
-272.815 -45.491 23.647 -10.868 4.408
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.408" Depth="0.123"/>
<TopsideChapman PeakHeight="416.527" PeakDensity="1131544.6" PeakScaleHeight="115.883" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
