<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-07 -038 21:20:00.000"
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="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: 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" >
2026.02.07 (038) 21:20:00</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">
FF202603802072120009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="10.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.487" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.229" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.550" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="295.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="295.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="110.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="495.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.020" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="407.468" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="321.870" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.139" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.900" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="123.795" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="40.282" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="62.735" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="130.430" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.690" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="3.350" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="153">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 295.000 295.000 295.000 295.000 295.000 295.000 297.500 300.000 302.500 305.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 330.000 331.000 332.000 333.000 334.000 335.000 335.000 335.000 335.000 335.000 335.000 337.500 340.000 341.667 343.333 345.000 345.000 350.000 350.000 350.000 350.000 355.000 352.500 350.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 381.667 383.333 385.000 385.000 385.000 390.000 391.667 393.333 395.000 395.000 400.000 400.000 400.000 405.000 405.000 410.000 410.000 410.000 410.000 412.500 415.000 415.000 420.000 420.000 422.500 425.000 425.000 430.000 430.000 432.500 435.000 435.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 450.000 455.000 455.000 460.000 460.000 460.000 465.000 465.000 470.000 470.000 475.000 475.000 477.000 479.000 481.000 483.000 485.000 495.000 495.000 495.000 495.000 495.000 501.667 508.333 515.000 520.000 525.000 530.000 535.000 539.084 543.573 548.531 554.034 560.178 567.082 574.896 583.813 594.084 606.043 620.144
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 72 72 66 66 72 72 0 0 0 69 0 0 0 0 63 0 0 0 66 69 69 51 72 72 66 69 69 69 0 0 0 69 57 0 0 0 0 57 60 66 66 69 66 0 72 0 0 69 72 63 0 69 69 63 0 0 60 66 0 72 0 0 0 60 66 69 60 66 69 57 63 66 0 0 69 72 72 69 0 0 72 66 66 72 75 66 72 60 66 75 75 66 72 72 66 69 57 66 69 54 63 0 54 63 69 69 66 69 63 63 54 63 66 57 63 54 63 63 60 63 54 60 54 60 0 0 54 0 57 48 57 0 54 45 0 0 54 48 51 48 54 51 48 0 48 42 45 0 48 45 48 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 1.953125 1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -1.171875 -2.734375 -1.953125 -1.953125 -2.734375 -1.953125 -2.734375 -2.734375 -0.390625 -2.734375 2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="14">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
120.000 120.000 118.750 117.500 116.250 115.000 110.000 111.250 112.500 113.750 115.000 115.000 115.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 63 0 0 0 66 54 0 0 0 63 0 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 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="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.25 95.0 100.0 105.0 110.0 115.0 120.0 125.0 126.53 130.0 135.0 140.0 143.059 145.0 150.0 155.0 159.589 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 407.468 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.679 0.884 0.987 1.02 1.003 0.95 0.855 0.816 0.816 0.816 0.816 0.816 0.84 0.902 0.963 1.02 1.032 1.16 1.276 1.389 1.505 1.626 1.754 1.89 2.035 2.191 2.358 2.537 2.729 2.932 3.147 3.372 3.606 3.846 4.092 4.342 4.595 4.85 5.105 5.362 5.618 5.874 6.13 6.385 6.64 6.893 7.146 7.398 7.649 7.899 8.148 8.395 8.639 8.882 9.121 9.355 9.585 9.807 10.02 10.221 10.406 10.572 10.714 10.826 10.905 10.945 10.95 10.948 10.935 10.909 10.871 10.823 10.763 10.694 10.616 10.529 10.435 10.334 10.226 10.112 9.992 9.868 9.739 9.607 9.471 9.333 9.192 9.048 8.903 8.757 8.609 8.461 8.312 8.163 8.014 7.866 7.717 7.57 7.423 7.277 7.132 6.989 6.846 6.706 6.567 6.429 6.293 6.159 6.027 5.897 5.769 5.643 5.519 5.396 5.276 5.158 5.042 4.928 4.817 4.707 4.599 4.494 4.39 4.289 4.189 4.092 3.997 3.903 3.812 3.722 3.635 3.549 3.465 3.383 3.303 3.224 3.147 3.072 2.999 2.927 2.857 2.788 2.721 2.656 2.592 2.529 2.468 2.409 2.351 2.294 2.238 2.184 2.131 2.079 2.029 1.98 1.931 1.884 1.839 1.794 1.75 1.707 1.666 1.625 1.586 1.547 1.509 1.472 1.436 1.401 1.367 1.333 1.301 1.269 1.238 1.208 1.178 1.149 1.121 1.093 1.067 1.041 1.015 0.99 0.966 0.942

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.02" PeakHeight="110.0" Num="3" Error="0.0">
-26.592 8.091 -1.249
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.02" EndFrequency="10.95" PeakHeight="407.468" Num="5" zHalfNm="321.87" Error="3.896">
-232.752 -26.248 15.903 -8.601 3.819
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="49.589" Depth="0.204"/>
<TopsideChapman PeakHeight="407.468" PeakDensity="1487624.1" PeakScaleHeight="62.735" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
