<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-27 -027 19:40:00.000"
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="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 F2o 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" >
2026.01.27 (027) 19:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" 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">
FF202602701271940009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="10.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.449" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.590" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.200" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.560" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="94.869" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="94.955" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="4.864" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="525.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.474" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="384.254" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="269.508" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.125" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="155.047" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="49.278" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="83.738" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="184.220" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.440" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="121">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 275.000 278.000 281.000 284.000 287.000 290.000 290.000 290.000 290.000 300.000 295.000 300.000 302.500 305.000 305.000 308.750 312.500 316.250 320.000 315.000 316.667 318.333 320.000 330.000 330.000 330.000 330.000 335.000 335.000 340.000 340.000 340.000 341.250 342.500 343.750 350.000 355.000 355.833 356.667 357.500 358.333 359.167 360.000 360.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 415.000 415.000 415.000 420.000 425.000 425.000 425.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 455.000 455.000 460.000 465.000 465.000 470.000 470.000 475.000 475.000 480.000 485.000 490.000 490.000 495.000 495.000 500.000 505.000 510.000 515.000 515.000 520.000 525.000 525.000 535.000 540.000 545.000 550.000 555.000 565.000 573.753 583.738 595.236 608.617 624.387 643.246 666.203
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 0 60 0 0 57 63 63 60 48 57 60 0 57 60 0 0 0 54 63 0 0 54 54 0 63 0 63 66 63 66 66 0 0 0 60 0 0 0 0 0 0 66 66 66 54 60 60 48 57 0 63 54 63 57 0 69 60 66 69 69 69 57 63 66 60 66 66 69 57 63 69 66 57 63 69 69 57 66 60 66 60 66 63 60 66 63 57 66 63 66 66 66 69 69 63 66 66 63 63 60 60 57 63 63 63 60 60 60 60 60 54 57 54 51 48 0 0 0 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 -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 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 -1.171875 -2.734375 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="8">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
94.869 95.637 96.497 97.475 98.611 99.971 101.680 104.011
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 57 57 0 54 0 0 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 -1.171875
</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" >
90.0 94.955 95.0 100.0 100.667 105.0 106.379 110.0 112.091 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 384.254 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.56 2.56 2.46 2.431 2.431 2.431 2.513 2.56 2.645 2.784 2.917 3.048 3.178 3.309 3.44 3.574 3.71 3.848 3.989 4.133 4.28 4.429 4.582 4.737 4.894 5.054 5.215 5.379 5.544 5.71 5.878 6.046 6.215 6.385 6.555 6.725 6.896 7.066 7.236 7.406 7.575 7.745 7.913 8.081 8.248 8.414 8.579 8.743 8.905 9.065 9.222 9.376 9.527 9.673 9.812 9.944 10.066 10.177 10.272 10.35 10.407 10.441 10.45 10.45 10.445 10.434 10.415 10.391 10.36 10.323 10.281 10.233 10.181 10.124 10.062 9.996 9.926 9.852 9.775 9.695 9.611 9.525 9.437 9.346 9.252 9.157 9.06 8.962 8.862 8.76 8.658 8.555 8.45 8.346 8.24 8.134 8.028 7.922 7.815 7.709 7.602 7.496 7.39 7.284 7.179 7.074 6.97 6.866 6.763 6.66 6.559 6.458 6.358 6.258 6.16 6.062 5.966 5.87 5.776 5.682 5.59 5.499 5.408 5.319 5.231 5.144 5.058 4.973 4.889 4.806 4.725 4.644 4.565 4.487 4.41 4.334 4.259 4.185 4.113 4.041 3.971 3.901 3.833 3.766 3.7 3.634 3.57 3.507 3.445 3.384 3.324 3.265 3.207 3.149 3.093 3.038 2.983 2.93 2.877 2.826 2.775 2.725 2.676 2.627 2.58 2.533 2.487 2.442 2.398 2.355 2.312 2.27 2.229 2.188 2.148 2.109 2.071 2.033 1.996 1.96 1.924 1.889 1.854 1.82 1.787 1.754 1.722

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.56" PeakHeight="94.955" Num="3" Error="0.651">
-7.242 2.943 -0.656
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.56" EndFrequency="10.45" PeakHeight="384.254" Num="5" zHalfNm="269.508" Error="3.643">
-240.106 -46.188 17.242 -5.079 1.968
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="17.136" Depth="0.129"/>
<TopsideChapman PeakHeight="384.254" PeakDensity="1354869.8" PeakScaleHeight="83.738" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
