<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-06 -037 17:40:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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) 17:40:00</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">
FF202603702061740009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="9.775" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="5.423" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.357" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.985" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="210.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="325.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="450.000" 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="3.140" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.350" 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="4.243" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="392.012" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="201.238" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="251.002" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.366" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="168.593" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="72.162" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="51.938" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="102.296" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="217.590" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.580" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.070" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="87">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
330.000 325.000 325.000 325.000 325.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 345.000 350.000 350.000 352.000 354.000 356.000 358.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 380.000 382.500 385.000 390.000 395.000 395.000 400.000 400.000 400.000 405.000 410.000 410.000 415.000 415.000 420.000 425.000 430.000 430.000 435.000 435.000 440.000 445.000 445.000 450.000 450.000 460.000 465.000 465.000 470.000 475.000 480.000 485.000 490.000 495.000 510.000 515.000 520.000 525.000 530.000 530.000 535.000 540.000 550.000 560.000 560.000 565.000 570.000 575.000 585.000 590.000 600.000 605.000 615.000 620.000 635.000 650.000 666.120 685.437 709.008 738.412
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 66 0 60 63 63 66 60 63 57 57 57 60 57 57 0 0 0 0 45 57 54 60 51 57 54 60 60 0 60 60 57 63 54 60 57 60 57 60 57 60 63 60 51 57 54 60 60 63 63 63 66 66 63 60 60 60 60 60 60 63 51 54 57 60 63 63 63 63 63 51 60 60 60 57 57 54 51 54 54 54 51 51 51 51 45 45
</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 -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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="22">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
210.000 215.000 220.000 227.500 235.000 242.500 250.000 257.500 265.000 272.500 280.000 285.000 295.000 300.000 304.286 308.571 312.857 317.143 321.429 325.714 330.000 330.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 48 0 51 0 0 0 0 0 48 48 51 45 0 45 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 -0.390625 2.734375 -0.390625 2.734375 2.734375 -1.953125 -0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 -2.734375 -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" >
89.523 90.0 95.0 100.0 105.0 110.0 112.6 115.0 115.201 117.801 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 201.238 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 392.012 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.111 2.718 3.038 3.14 3.018 3.018 3.018 3.14 3.222 3.39 3.562 3.75 3.949 4.142 4.312 4.46 4.589 4.706 4.813 4.913 5.009 5.104 5.199 5.299 5.408 5.423 5.56 5.718 5.866 6.008 6.15 6.292 6.436 6.583 6.731 6.882 7.033 7.183 7.332 7.478 7.621 7.759 7.892 8.021 8.145 8.264 8.379 8.491 8.598 8.702 8.804 8.902 8.998 9.091 9.181 9.269 9.355 9.437 9.515 9.589 9.655 9.711 9.752 9.773 9.775 9.774 9.769 9.76 9.747 9.729 9.708 9.683 9.654 9.621 9.586 9.547 9.505 9.461 9.413 9.363 9.31 9.255 9.198 9.138 9.077 9.013 8.948 8.881 8.813 8.743 8.672 8.599 8.526 8.451 8.375 8.299 8.222 8.143 8.065 7.985 7.906 7.825 7.745 7.664 7.583 7.501 7.42 7.338 7.257 7.175 7.094 7.012 6.931 6.85 6.769 6.689 6.608 6.528 6.449 6.37 6.291 6.213 6.135 6.058 5.981 5.905 5.829 5.754 5.679 5.605 5.532 5.459 5.387 5.315 5.244 5.174 5.104 5.036 4.967 4.9 4.833 4.767 4.701 4.637 4.573 4.509 4.447 4.385 4.323 4.263 4.203 4.144 4.085 4.028 3.971 3.914 3.858 3.803 3.749 3.696 3.643 3.59 3.539 3.488 3.437 3.388 3.339 3.29 3.242 3.195 3.149 3.103 3.058 3.013 2.969 2.926 2.883 2.84 2.799 2.758 2.717 2.677 2.638 2.599 2.56 2.522 2.485

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.14" PeakHeight="110.0" Num="3" Error="0.0">
-30.31 12.871 -3.038
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.14" EndFrequency="5.423" PeakHeight="201.238" Num="5" Error="0.0">
-66.946 -26.192 15.277 -7.682 2.106
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="5.423" EndFrequency="9.775" PeakHeight="392.012" Num="5" zHalfNm="251.002" Error="3.692">
-168.77 -33.377 16.07 -7.454 2.757
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.801" Depth="0.122"/>
<TopsideChapman PeakHeight="392.012" PeakDensity="1185491.6" PeakScaleHeight="102.296" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
