<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-27 -086 23:10:00.000"
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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: Moderate F-spread, F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.03.27 (086) 23:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608603272310009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.914" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.407" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="375.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="375.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="425.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="394.787" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="376.246" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.959" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="30.969" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.523" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="14.543" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="57.130" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="142">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.7 2.75 2.8 2.85 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
375.000 375.000 385.000 386.667 388.333 390.000 390.000 390.000 388.333 386.667 385.000 387.500 390.000 390.000 390.000 390.000 385.000 390.000 390.000 390.000 390.000 390.000 390.656 391.311 391.967 392.623 393.279 393.934 394.590 395.246 395.902 396.557 397.213 397.869 398.525 399.180 399.836 400.492 401.148 401.803 402.459 403.115 403.770 404.426 405.082 405.738 406.393 407.049 407.705 408.361 409.016 409.672 410.328 410.984 411.639 412.295 412.951 413.607 414.262 414.918 415.574 416.230 416.885 417.541 418.197 418.852 419.508 420.164 420.820 421.475 422.131 422.787 423.443 424.098 424.754 425.410 426.066 426.721 427.377 428.033 428.689 429.344 430.000 435.000 415.000 420.000 420.000 421.667 423.333 425.000 424.722 424.444 424.167 423.889 423.611 423.333 423.056 422.778 422.500 422.222 421.944 421.667 421.389 421.111 420.833 420.556 420.278 420.000 415.000 410.000 410.000 410.000 405.000 405.000 410.000 410.000 410.000 410.000 410.000 410.000 410.000 410.000 410.000 410.000 410.000 410.000 410.000 410.000 410.000 410.000 410.000 410.000 410.000 415.000 417.500 420.000 422.500 425.000 430.000 435.000 437.500 440.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 54 63 0 0 69 0 60 0 0 60 0 63 0 0 60 60 66 63 0 63 63 51 0 0 0 0 0 0 0 0 63 63 54 60 0 0 0 0 0 54 57 0 0 0 0 0 54 0 0 0 51 0 0 0 0 0 0 51 0 0 54 51 0 0 0 0 0 0 0 0 54 0 0 0 0 0 54 48 0 0 51 51 51 60 57 57 0 0 54 0 0 0 0 57 0 57 0 54 0 0 54 60 57 0 0 57 63 60 57 60 63 57 57 57 54 63 0 0 57 0 60 57 54 0 51 60 57 0 60 57 0 54 57 0 0 0 54 0 57 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 0.390625 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 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 1.171875 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 -1.171875 -0.390625 1.171875 0.390625 -1.171875 0.390625 -0.390625 1.953125 1.953125 1.953125 0.390625 2.734375 -2.734375 1.953125 1.171875 1.171875 -1.953125 -1.171875 -0.390625 0.390625 1.171875 -1.171875 -0.390625 0.390625 -1.171875 1.171875 0.390625 0.390625 -0.390625 0.390625 -1.171875 1.171875 2.734375 -1.953125 2.734375 -0.390625 -1.171875 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 1.171875 0.390625 1.171875 -1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 -0.390625 0.390625 -1.171875 -0.390625 -0.390625 -1.953125 -0.390625 0.390625 0.390625 -1.953125 1.171875 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 1.171875 0.390625 0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -1.171875 -0.390625 -0.390625 2.734375 -1.953125 -1.171875 0.390625 -1.953125 -2.734375 -2.734375 -1.171875 1.953125 -1.171875 -1.953125 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="106">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.479 145.0 150.0 155.0 160.0 165.0 170.0 175.0 178.957 180.0 185.0 190.0 195.0 200.0 205.0 210.0 213.436 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 394.787 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.344 0.33 0.311 0.284 0.246 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.205 0.227 0.249 0.272 0.294 0.316 0.339 0.354 0.38 0.487 0.611 0.734 0.853 0.969 1.083 1.198 1.314 1.432 1.553 1.677 1.806 1.938 2.076 2.219 2.369 2.525 2.689 2.862 3.045 3.238 3.444 3.663 3.897 4.148 4.42 4.716 5.039 5.395 5.792 6.24 6.754 7.356 8.085 8.992 9.75 9.75 9.637 9.351 8.938 8.442 7.896 7.327 6.757 6.199 5.664 5.158 4.684 4.245 3.841 3.47 3.131 2.823 2.543 2.29 2.061 1.854 1.667 1.499 1.347 1.211 1.088 0.978 0.878 0.789 0.709 0.637 0.572 0.514 0.462 0.415 0.372 0.334 0.3 0.27 0.242 0.218

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="9.75" PeakHeight="394.787" Num="5" zHalfNm="376.246" Error="3.81">
-131.405 -79.832 32.229 0.606 -2.949
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="103.436" Depth="0.154"/>
<TopsideChapman PeakHeight="394.787" PeakDensity="1179435.5" PeakScaleHeight="14.543" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
